A son becomes entangled in his mother's abnormal sexual desires, leading him to discover her true nature and confront an impossible decision. In the prime of her life, Ryō finds herself irresistibly drawn to the scent of young masculinity that her husband can no longer provide, losing control to her own urges. Unable to suppress his mounting impulses, her son is forced to face the shocking reality of his mother's desires. What choice will he ultimately make? A dramatic tale of forbidden passion unfolds between mother and son.