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.

Alec is injured in a car accident while joyriding with his friends who are intoxicated on a dangerous new drug sweeping the streets. Kiera recognizes this new poison as a drug from her future and deduces that Liber8 is responsible for putting it on the streets. Julian’s mother visits him in prison, awakening his desire to take the fight in a new direction.

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.

After a surprise attack by the shadowy group posing as Section Six, Kiera is captured by Julian’s followers. Alec reactivates Travis' military chip in order to hunt him, but the hunter soon becomes the hunted.

Chaos breaks out in Vancouver when a series of cyber attacks turn the city upside down. Kiera and Carlos race to find the perpetrator while clues suggest Alec's own technology has something to do with it.

Kiera races to rescue Alec from himself and preserve her own chance of getting home. Alec must make a difficult decision between solving Kiera's dilemma or his own.

While Kiera investigates the two Alecs in one timeline, the mayor is kidnapped by a reunited Liber8. Carlos struggles with the reality shattering truth of Kiera’s predicament.