Secluded on a remote Greek island, retired assassin Julie has a somewhat thorny reunion with her estranged son, Edward, visiting from England. Armed with questions around new information on his paternity, Edward battles to find the right time to speak to his frustratingly distant mother. But, when the moment finally presents itself, things take a deadly turn as Julie's dangerous past catches up with her and they are forced to flee the island and go on the run together.

Edward's quest for truth clashes with Julie's secrecy whilst they are forced to work together in a fight for survival, testing their dysfunctional relationship to its limits. Amid uncovering a dark conspiracy they believe to be their only threat, a greater danger emerges that will destroy their relationship entirely. In a race against time, Julie fights to save Edward and salvage their relationship as past and present collide in a showdown across the globe…