A voyeuristic glimpse into a taboo masturbation session, Jeannot's lens zooms in on a brother and sister, both alone and bored. The sister, hidden in the bathroom, tentatively explores her body, fingers delving into her wet pussy, while her brother, unaware, showers nearby. Caught in the act, they argue, but later, curiosity and desire overcome them. Naked, they openly masturbate, their eyes locked on each other's intimate parts. Just as they're about to cross the line, an unexpected interruption forces them to halt their forbidden encounter.