The class of '09 meets for the first time at Quantico; in the past, Agent Poet concludes her most challenging undercover operation only to be plunged into another; in the future, with the Bureau changed, Poet's career reaches a crisis point.

The class of '09 must pass a physical fitness test; the trainee most at risk is Tayo, who struggles both in the past and present; in the future, these events were behind the radical changes he's made to the Bureau.

At Quantico, Poet faces a challenging driving course; in the present, Poet's undercover operation brings the FBI to a critical juncture, while Tayo hunts down a domestic terrorist cell; in the future, Poet investigates the scope of Tayo's power.

At Quantico, the Class of '09 faces the meaning of taking a life; in the present, the agents must thwart a terrorist attack and to save lives, they must take a life; in the future, they come face to face with their trauma.

The class grapples with the complex history of the Bureau, and Tayo meets the love of his life; Tayo's dreams of making amends for the Bureau's history threaten his love story; the class finally confronts each other.

At Quantico, the class must complete the impossible challenges of Hogan's Alley; Poet, pursuing a deadly serial killer, is helped by an old friend; tragedy strikes and the justice system is no longer under human control.