Fifteen years after the disappearance of her husband, Claire, her son and her new husband move to Abu Dhabi for a fresh start.

Troubled by her findings regarding Gabriel, Claire decides to use her cyber security engineer skills to help.

Claire and Gabriel attempt to find the mole who implanted the Nexus on the site; Claire is placed under Asgard surveillance.

After wire-tapping Doug, Asgard's agent and fake investor in Lukas' restaurant project, they discover the identity of the mole.

Claire uses the mole's identity card to get into the nuclear power plant; she's the only one that can prevent the catastrophe; back at their hideout, Claire and Gabriel are not ready to let down their guards.

Claire and Gabriel must prevent the remote detonator from being sold to the highest bidder; Zack is taken hostage.