When the FBI discover a mysterious ciphered document, they call in a cryptanalyst. As he tries to balance fatherhood and his work, what he deciphers puts his own life at risk.

The mysterious people after the hit list fake Will's death. Now he tries to stay off the streets, and meets a mysterious woman who takes him in. Will contacts his FBI friend, Kurt, and suffers the sting of betrayal.

Will tries to figure out who Kurt was working for, and he returns to Claire's so they can crack the rest of the ciphered list together. Other ominous, interested parties give the FBI investigation team reason to be concerned about who this crypto-analyst Will actually is and which side he's on.

Will and Claire rush to reach the next victim of the list before it's too late, all while Will tries to stay undercover and appear dead. The FBI team experience some breakthroughs in their investigation as they try to get to the bottom of those responsible for the death of several FBI agents.

Will reconnects with daughter Anna and she promises to keep his secret. The FBI talk with Will's ex-wife and daughter, and their frenzy to catch Will increases when Will and Claire slip up and blow their cover. Meanwhile, Will deciphers the next target on the list.

When the FBI locates a copy of the list, they bring in a new cryptographer to crack the code. Will visits a hacker friend and discovers a new lead to unlock Kurt's phone, which reveals new information about Claire.