Martin Odum is a fugitive, hiding out in present day London and wanted by the FBI for a crime he did not commit. He can't remember his life prior to an injury he suffered in the Iraq War, so he's searching for clues about his true identity with the help of CIA agent Nina Brenner. Meanwhile, in 2001, FBI agent Curtis Ballard and his Czech Police partner, Gabi Miskova, launch an investigation into a Russian gangster named Dimitry.

In present day London, Martin is finally able to make contact with Ilyana Crawford, a woman who may be linked to his past. Unable to get answers from her, he turns to her teenage daughter, Kate, who is in search of her own identity. In 2001 Prague, Dmitry is on a mission to locate a wanted war criminal believed to be connected to the Chechen gangsters. But Dimitry's handler is concerned that his infiltration techniques may be crossing the line.

It's a race against time as Martin searches for Kate in Paris. He's convinced the peaceful protest she's attending may turn unhappy at the hands of her friend Ifti, a boy with radical beliefs. In 2001 Prague, Dmitry discovers that the key to getting close to Doku Zakayev may not be his brother Tamir, but instead Doku's wife, Ilyana. In 1991 Lithuania, a younger Ballard is involved in an incident that will affect the rest of his life.

Kate becomes a fugitive in modern-day Paris, so Martin puts her into hiding. Meanwhile, Ballard unearths information that could lead him to Martin and Ilyana asks Dimitry for a dangerous favor in 2001 Prague.

Kate is offered a deal by Nina and an MI6 agent in modern day Paris, to Martin's chagrin. Meanwhile, Ballard convinces the FBI to allow him to take down Martin, Ilyana is enlisted as an operative in 2001 Prague and Terrance's secrets emerge.

Martin prepares Kate for a dangerous job; Gabi confronts the intelligence agents about Martin Odum. In 2001 Prague, Ballard and Gabi discover Dmitry has a vulnerbility and in 1984, Alex is recruited for a distinquished position.

Martin fears Kate has been abducted; Gabi discovers that Blazek may have a connection to Tamir; in 2001 Prague, Ballard and Gabi use questionable methods to threaten Dmitry and in 1985 Alex suspects Terrance has resorted to ruthless tactics.

Martin goes back to work for Tamir; Gabi confronts Blazek about his secret dealings; Kate is held prisoner in the President's compound in Chechnya and in 2001 Prague, Dmitry tries to convince Tamir to earn General Arsanov's trust.

Martin and Nina search for Tamir's associates in hopes of getting some answers; two Chechen assassins put a deadly plan into action.

Martin makes a deal with the Russians to rescue Kate; Gabi struggles to make a decision about her husband; in 2004, Dmitry asks one last favor of Terrance; in 1972, the last pieces of the puzzle to understanding Martin Odum's identity are revealed.