Rookie CIA analyst Alex O'Connor is assigned his first case - to examine the statements of a defecting Russian spy, who claims that rogue elements within her organization are planning a catastrophic attack that will bring America to its knees. Unbeknownst to Alex, his parents, Katya and Mark, are part of the dormant Russian sleeper cell he's investigating, and an unwelcome friend from the past arrives on their doorstep to give them a new mission: turn their son into a spy before his investigation unmasks them. With nowhere to turn, Katya and Mark must choose - flag, or family.

In the aftermath of a violent shootout, Alex must convince the FBI to risk a dangerous covert operation to find Mikhail's hidden cache. With Agent Prado at his side, Alex leads a team to Philadelphia to retrieve the laptop from a secure government building, but Victor is a step ahead and orders the O'Connors to break in and steal the laptop first. Meanwhile, Katya discovers one of Natalie's most dangerous secrets, and forces her to choose between love and family.