The series follows a young man's burgeoning and uncontrollable lust for his older stepsister. His obsession begins innocently enough, but quickly spirals when he discovers a pair of her panties. This single fetishistic trigger unleashes a torrent of desire, leading him to blackmail her. He forces her into a series of humiliating and intensely pleasurable sexual encounters. Each episode sees their depraved relationship deepen, exploring new carnal acts. He relentlessly fucks her in various positions, makes her suck his cock, and uses her body to satisfy every one of his pent-up fantasies, all while she feigns resistance but secretly craves his dominant seed.