When their parents go on a romantic getaway, the new stepsibling, Aria (Holly Day), and stepbrother, Kyle (Lucky Fate), are left alone at home. Aria, being playful and innocent, wants to bond with Kyle, suggesting they play a sexy game of doctor!Kyle is initially taken aback and uncomfortable by the proposal, as he interprets 'playing doctor' as a sexual activity, while Aria sees it as harmless fun. After some convincing, he decides to entertain her, and Aria eagerly takes the family's medical kit.That's when Kyle starts examining Aria in detail, using a tongue depressor to touch her tongue, a reflex hammer on her knee, and checking her blood pressure on her arm. Kyle is already feeling uneasy, but things escalate when Aria asks him to listen to her racing heartbeat by placing a stethoscope on her chest.The intimacy triggers something within Aria, and she eventually dares her hesitant stepbrother to inspect her private area when she starts feeling a tingling sensation...Will Kyle halt the provocative game or is he too entranced to stop?