Former yakuza member Sanae Aso, after the death of her husband, left the underworld and became the proprietress of a traditional Japanese restaurant, living a quiet civilian life. One day, her former junior gang member, Ryuji, suddenly reappears and visits her. His return brings with it a grave revelation—after the death of their former boss, the new leader, Saito, has become deeply involved in human trafficking. As Sanae reunites with her old comrades, she finds herself facing a new and dangerous crisis.