After the death of their mother, sisters Mary (Alana Kearns-Green) and Marie (Alexandra Roxo) decide to spend a final, idyllic summer in the home where they grew up. An exceptionally close pair, they spend their time alone, swimming, exploring and reminiscing, their intimacy growing stronger and stronger until it's clear that the are crossing the usual familial boundaries. When the arrival of a visitor threatens to break their seemingly unshakable bond, the course of the summer takes an unpredictable turn and the nature of their relationship appears threatened forever. A dazzling, inventive take on the intimacy that develops between two women, Mary Marie is unmissable.