After an unexpected loss devastates the FBI task force, they must track down their assailants; a mysterious group whose agents operate using a worldwide satellite network. Meanwhile, Reddington is forced to confront a ghost from his past -- one who knows many of Red's secrets.

The FBI task force's hunt for revenge nears its endgame. As Reddington and the team close in on the mysterious arch-criminal responsible for recent tragic events, they're forced to operate outside their comfort zone -- and outside the law -- in order to take down their enemy once and for all.