Sisters, always close but never this close, find themselves in a situation that awakens their bi-curiosity. A late-night game of truth or dare leads them to share their deepest fantasies, and soon they're touching each other, their breaths hitching as they feel the familiar yet unfamiliar curves. A knock at the door reveals a sleepy brother, who's invited to join. He watches, then tentatively participates as the sisters explore each other, their inhibitions melting away with each touch and kiss.