Shihori lives with her civil servant husband and their son. The son is crushed under the weight of his strict father's constant scolding, building up unbearable stress. Amid this tension, Shihori becomes the target of her son's pent-up rage and is violently assaulted by him. But it doesn't end there—Shihori ends up having sex with her own son. Rather than feeling regret, her unsatisfied desires ignite a deeper fire within her, and under the pretense of relieving stress, she begins actively seeking out her son. As emotions within the household spiral out of control, an intense and twisted relationship unfolds.