Their formal training complete, Alexa and Alison are in high demand. Despite differing opinions about their life, they function well as a team. But an assignment to eliminate a family in Russia threatens to change everything between them. Believing their mission accomplished, Alison arranges their departure from the country. But she soon learns Alexa wasn't truthful about her part of the assignment. Sought by Russian authorities, they also know others will take note of their incomplete mission. Failure is not accepted in their line of business. Deciding their best chance of survival is to separate, they arrange to meet in Kazakhstan. However, plans run afoul when Alison is forced back to Russia, while Alexa struggles to navigate through Kazakhstan alone. To save her family, Alison must complete their mission. Not knowing the fate of her sister, she struggles to finish what Alexa left undone. Her own survival is highly questionable. Will the twins reunite or has Alexa's actions forced the unthinkable? Worse, will their entire family pay the price?