A forbidden romance between siblings unfolds here. Responding to her younger brother's desire to have sex with her, the older sister travels to his apartment where he lives alone after being transferred for work. Having secretly loved her brother for years and enduring a long-distance relationship, her sexual desire finally peaks, pushing her to cross the line into taboo intimacy. The brother confesses, "I've never forgotten how we used to touch each other's bodies when we were kids," and eagerly asks his sister for their first kiss, to see her breasts, and to look at her pussy. With their parents away, the two dive passionately into an intense incestuous affair.