To save her college best friend, Miyo, Natsuki is kidnapped by a group of men. However, she is the only one who escapes, while Miyo's fate remains shrouded in mystery. Years later, Natsuki is living a happy married life when she suddenly receives a message from Miyo. This marks the beginning of a new plan—Miyo's revenge, luring the one she believes abandoned her into a deadly trap.