Teacher Minako (Ashina Yuria) suffers a tragic chain of events when her father commits suicide after being swindled by a member of the Mochizuki gang, and her older sister is sold into the sex trade. Traumatized and broken, she stabs a Mochizuki gang member in retaliation, leading to a prison sentence. Upon release, she hopes for a quiet, ordinary life—but the Mochizuki gang's revenge looms close, and she is kidnapped and imprisoned once again. Her anguish and burning desire for vengeance strike deep into the heart.