Naive and reserved, Genna's stepsister finds herself in a compromising position as she accidentally walks in on her stepbrother masturbating. Awkwardness turns into curiosity as she watches him, her own desires stirring. She tentatively touches herself, her innocence slowly unraveling as she explores her newfound urges. Her stepbrother, noticing her, invites her to join him, and she tentatively agrees, discovering the thrill of shared intimacy.