After the father becomes sexually impotent, he begins tormenting his wife nightly with sex toys. His actions are cruel and torturous, reducing her to agony. Their son secretly watches the scenes, torn between concern for his mother and overwhelming arousal, masturbating with a hardened erection. But when the father allows one of his female subordinates to sleep with his wife, the Saijou household descends into a madhouse of depraved desires. Family order collapses, bonds twist beyond recognition, and a whirlpool of new lusts begins to consume them all.