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.

When Reddington links an elegant, powerful and extremely dangerous woman to the recent tragic events, the task force is forced to play a deadly cat and mouse game to stop her before she strikes again.

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.

Liz abandons her old life and seeks out a fresh start in a place where no one knows her history, her name, or the depths of her grief. When an unexpected threat finds her, she is forced to draw on her emotional and physical strength in a brutal fight for survival.