Mi final feliz

Jae Won begins plotting revenge. She asks investigator Tae Ju to look into her mother's death and attends an alumni reunion after learning that her former friend Yun Jin is there.

Te Oh witnesses Yun Jin and Jae Won's husband Sun Yeong at a hotel and confronts them. Meanwhile, the stalker's identity is revealed but Jae Won's brakes unexpectedly fail while driving.

Jae Won and Sun Yeong fight over their daughter Ah Rin's custody. Learning that spouse-at-fault could gain custody, she offers him poisoned wine. However, an old secret between Tae Oh and Jae Won resurfaces.

Jae Won learns that hiding a history of mental illness from a spouse could justify divorce. As Sun Yeong investigates her, Jae Won struggles to keep her secrets hidden.