Kiera must race against the clock when she realizes that in her timeline, today is the day that terrorists bomb a building killing hundreds of innocent people. As she tries to stop the imminent bombing, Liber8 kidnaps her trusty sidekick Alec after he realizes his stepbrother Julian is under their sway.

Kiera resurfaces after the mayor is killed in a brazen assassination. She reunites with Carlos to solve the murder and also tries to reconnect with Alec, who has changed since reading the message from his future self.

Kiera and Carlos's reunion is a bumpy one as they attempt to thwart Liber8's brazen hijacking of a prison transfer. Meanwhile, Kellog approaches Alec with an enticing partnership proposition. The young genius is tempted, but will it lead him down a dark path?

It appears another time traveler has arrived in 2013 when the CMR network "pings" a brief connection with another CPS suit. Kiera's pursuit of the traveler leads her to her old partner, Elena - but also draws unwanted Liber8 attention, and dangerous scrutiny from Gardiner of Kiera's every move.

Sam's Birthday puts Kiera on the path to an emotional meltdown which triggers an internal diagnostic within Kiera's CMR that forces her to deal with her loss or lose her tech abilities. Meanwhile, Kiera becomes the target of a department mole hunt, when Dillon is ousted and Escher installs Nora Masters as his puppet.

Kiera and Carlos discover that a Juror on Julian's trial has been compromised and must race to protect his family from a Liber8 plot. Alec is torn between telling the truth at his brother's trial or protecting his mother. Emily reveals she is more than just a pretty face.

Kiera investigates the mysterious disappearance of several deceased time travelers’ bodies while Alec is taken hostage by Garza on orders from his future self.

Kiera and Carlos must stop Travis after he gets his hands on a second CPS suit while Alec and Emily try to escape the mysterious Freelancers and deal with a revelation about his past that could change everything.