Billie, Mary Alice, Helen and Natalie have worked for the Museum, an elite network of assassins, for 40 years. Now their talents are considered old-school, and no one appreciates what they have to offer in an age that relies more on technology than people skills. When the foursome is sent on an all-expenses-paid vacation to mark their retirement, they are targeted by one of their own. Only the Board, the top-level members of the Museum, can order the termination of field agents, and the women realize they’ve been marked for death. Now, to get out alive, they have to turn against their own organization, relying on experience and each other to get the job done, knowing that working together is the secret to their survival.