In the quiet confines of their shared room, an 18-year-old virgin and his curious sister find themselves alone and curious. She, with her newfound womanhood, and he, with his raging hormones, discover their bodies' responses to each other's presence. As they innocently touch and explore, they cross an unseen line, their excitement growing with each stolen caress. Their first time is a clumsy, passionate dance, a secret they'll cherish and regret in equal measure.