Bank heists rarely go off without a hitch. Robbers often double-cross each other. Cops get trigger happy. Hostages wind up in the crossfire. Double-crosses occur. Those ordinary curveballs would be welcomed in The Vault. Opening on September 1, the movie finds two estranged sisters–Vee (Taryn Manning) and Leah Dillon (Francesca Eastwood)–forced to rob a bank in order to save their brother.