Rina, who has quietly started living with a family consisting of an unemployed, alcoholic father and his reclusive son, endures sexual abuse from the father. Despite her suffering, she can't suppress her own desires and repeatedly masturbates in front of the same greengrocer. One day, the father brings over a drinking buddy and summons Rina, forcing her to perform lewd acts with both men. Witnessing this depravity and his father's relentless lust, the son is overwhelmed and finally reaches his breaking point.