Description: Alone on a seaside vacation, Leda (Olivia Colman) becomes consumed with a young mother and daughter as she watches them on the beach. Unnerved by their compelling relationship, (and their raucous and menacing extended family), Leda is overwhelmed by her own memories of the terror, confusion and intensity of early motherhood. An impulsive act shocks Leda into the strange and ominous world of her own mind, where she is forced to face the unconventional choices she made as a young mother and their consequences.