On the season finale of CSI: Cyber for this year, Nelson hid on the rooftop of a building and opened a case with a camera in it. He then called Raven and left a message on her cell phone telling her he was sending her a file but she shouldn’t open it.

Daniel met his sister Francine for breakfast at a diner, where the two spotted Taylor Pettis, the man that killed their parents and Daniel said he wanted to talk to him. Daniel sat down at Taylor’s table and told him he had wanted him to get the death penalty. Taylor then asked for his check so he could leave. In the meantime, Daniel called him a scumbag criminal and said he was Taylor’s worst nightmare. Daniel said it was his mission to catch Taylor doing something else and have him thrown in jail permanently for it.

At the FBI Headquarters Agent Ryan talked about their latest case, involving several people being hacked. Voice recordings from therapy sessions were accessed by a hacker without going through the mobile devices of the victims in order to do so. Dr. Richard Chan’s patient files had been hacked into, revealing what they talked about in therapy. They got the doctor’s address, went to it and found him dead. An hourglass from his apartment gave the FBI the fingerprints of the person presumed to have killed him.

Nelson was late for work and Raven tracked down his location because she was worried about him. She found him on the rooftop with his wrists tied to a pole. Raven freed Nelson and found out that she had inadvertently helped him commit a crime. Nelson said he needed to talk to Agent Ryan about it.

Agent Mundo and Simon told Agent Ryan that the fingerprints found in the apartment were hers. She said that the hourglass in the doctor’s apartment was probably the same one she used to keep on her desk when she was a psychologist. Simon told Agent Ryan that someone had leaked details on the case. Nelson then came in and asked to talk to Agent Ryan privately.

He told Agent Ryan that he needed her cell phone and personal laptop because someone was spying on her. Nelson said he found this out because he had been spying on her in attempt to find the hacker that got into her client files when she was a psychologist. He told her he had found the files on her former patients. Nelson helped Agent Ryan determine that the hacker in this case was her hacker too.

Agent Ryan told Agent Mundo that her hacker had been watching her since the day he hacked into her patient files and that she was his intended victim, not the patient who died because of the hacking.

Taylor Pitt, the man who killed Daniel’s parents, filed a complaint against him over the incident in the diner.

At home, Agent Ryan transferred all her files to the FBI computer Daniel had given her to use until the case was solved. Her hacker put a virus in her files that allowed him to track every move. She used the computer to contact her hacker and ask him why he did it. He gave her the address of a bus terminal and said he wanted to see her in person and that she shouldn’t bring any devices with her.

The FBI’s computers were then infected with a malicious code because Agent Ryan had transferred her files to her temporary FBI computer. The flash drive the FBI had was suddenly gone.

Agent Ryan arrived at the bus terminal and went to a locker her hacker told her to go to. She opened it and saw a cell phone that he texted her on. The cell phone was glued to the inside of the locker. The hacker told her via text message to go to a different location.

Raven and Nelson tracked down the hacker to a home address in Connecticut. Agent Mundo went to the address and pulled a gun on Andrew, the man in the house. He then arrested Andrew and demanded to know where Agent Ryan was. Andrew said that Agent Ryan was his ex-wife but he hadn’t seen her in four years.

When Agent Ryan arrived at the location she was directed to, she saw office furniture set in an abandoned factory. The hacker turned out to be one of Ryan’s former patients, who had stolen her nameplate from her office. Through a video call on the computer the hacker said she had failed all her patients. He told her he thought they had a special relationship. She then figured out his name was Logan Reeves. Logan then came into the room with her and told her she abandoned him and the doctor she sent him to after she lost her practice made him take drugs he didn’t want. He said he became a hacker to get to know Agent Ryan better. He screamed at her for giving up on him, destroyed the computer and walked away. He then came back and admitted to Agent Ryan that the patient of hers that had been killed was killed by him because he was jealous Ryan helped that patient, but not him. He told her that the woman’s ex-husband had gone to jail for murder because Agent Ryan testified that he was abusive towards the woman and was responsible for her death. He then said he had released carbon monoxide in the factory and that it was going to kill Agent Ryan. She then repeatedly hit him on the head, called Agent Mundo and told him where she was before she lost consciousness. The FBI came and rescued Ryan and arrested Logan.

Back in D.C. Daniel’s sister confessed to him that she had killed Taylor Pitt. Simon had been at the scene of the shooting but didn’t know what happened.

In the near season ender of CSI: Cyber, Daniel ran through a house and upstairs to a computer. He then typed something into it and ran back downstairs to see his “little brother” and Agent Ryan pleading with him to come with them. When he went to stand with them viewers saw the barrel of a gun but not the person holding it.

Flashing back 36 hours earlier, Downtown Detroit experienced a power outage that made traffic stand still. Agents Ryan and Mundo went to the area to investigate the reason behind the power outage. They told workers that the city’s power grid had been hacked into. Nelson and Raven were in the power supply room for the city of Detroit trying to figure out who had gained control of the system. The hacker erased the startup disk of every computer the city used to control power. Raven said it was strange that the hacking only knocked out power in 15 blocks throughout Detroit. She also mentioned that when she was an illegal hacker she disabled an entire state’s electricity. Raven then congratulated Nelson on being with the FBI’s cyber- crime division for two months.

Agent Mundo then told Agent Ryan that the government and financial districts were the ones affected by the power outage. Nelson then told them the city’s power grid was back online. He also said Raven was writing a patch of code that would prevent the hacker from disabling the power grid. Agent Ryan told Nelson to infiltrate the laptop computer of the hacker first.

A mystery man dressed all in black was then seen breaking into a jewelry store. The man heard a door close behind him and turned around, firing off his gun. Viewers heard the sound of a body falling on the floor and the man fled the scene. As he did, the store’s alarm went off because power had been restored to Downtown Detroit.

Benjamin, the son of the jewelry store’s owner, was the man that was killed. They found a laptop computer in the jewelry store that had nothing on it but the details of someone’s bitcoin account, which was empty at the time. Agent Ryan then said the incident was a bitcoin heist and that is why the robber didn’t take any jewelry from the store. Benjamin’s father told Agent Mundi his son had almost a half million dollars in bitcoins in the jewelry store’s account. Stephen, Benjamin’s older brother, was the only other one who knew where the laptop was in the store’s vault. The information to log into Benjamin’s bitcoin account was stored there.

In the store’s security footage they found a picture of the man who broke in. Daniel pulled up a log that showed the amount of bitcoins in the account in question before the store was robbed. Daniel also said the killer probably had the passkeys to the bitcoin account. When he looked closer he found there were two passkeys to this account, implying the killer had an accomplice.

Nelson found the address of the person who gained access to the bitcoin account and drained it. Agents Ryan and Mundo went to the address and found it was a hotel. When they found the killer’s room they burst in only to find the man had been attacked. They got the man’s ID and found out he was Brian Kramer, a man who robbed bitcoin accounts for a living.

They found Stephen and brought him in for questioning. Stephen said he tried to warn Benjamin and his parents that bitcoins are risky, but they didn’t listen. He also said he wanted back the half million they had in bitcoins so his parents would have retirement money.

A man came home from work to find another man in his house, doing something on his computer. The two then got into a physical altercation and a third man came in and attacked the homeowner. One of the men that broke in then said they had one of the passkeys but still needed the other.

Daniel said that he almost had access to the passkeys they needed. The bounty hunters that had the passkeys then sent an email to Stephen. They determined that the computer the email had been sent through had parental controls on it. Raven then got the address of the bounty hunters.

Agents Ryan and Mundo went to Oklahoma, where the homeowner lived that had an intruder in his apartment when he got home from work.

At FBI headquarters a package was delivered to Nelson containing everything he had confiscated when he was arrested for hacking, meaning his probation was now over. They then put the computer virus found on the Oklahoma man’s computer in order to determine who the bounty hunters were. Daniel determined that their final destination was Denver. Jeremy and Henry Spitz were men found to be in both Detroit and Oklahoma at the times when incidents occurred there. Agent Ryan surmised they may be the bounty hunters.

The team arrived in the hometown of the Spitz brothers. Simon and Raven went to Albuquerque to work on the case there too. Raven was able to recover the second passkey and email it to Nelson.

In Denver, Nelson, Daniel and Agent Ryan worked to catch the bounty hunters, but the FBI’s connection to the computer was then disabled. Daniel ran into the house that he was seen in at the beginning of the episode and tried to reconnect the computer to the FBI’s computer. When he got it reconnected he ran down to the living room only to have a gun pointed at him by the bounty hunters. Agent Ryan told them that Daniel and a child in the house were her family.
Agent Mundo burst into the house and pointed his gun at the bounty hunters. The family got their money back and Nelson spoke to his parents again, a first since his hacking trial.