A secret marriage service is uncovered when a trunk washes up on the shore, revealing the strange marriage between a couple in the thick of it all.
Noh In-ji receives her next field wife assignment. Han Jeong-won struggles with his separation from ex-wife Lee Seo-yeon and an impending second marriage.
Five years ago, after her fiancé vanishes, In-ji has a fateful meeting. In the present, she learns more about her new husband and his ex-wife.
Jeong-won slowly warms up to his new wife. Sensing a change, Lee Seo-yeon tries to make her ex crack. Meanwhile, someone from In-ji's past resurfaces.
As In-ji creates a homey life and instills peace around Jeong-won, he grapples with his growing desire for her. Seo-yeon can't handle losing control.
Jeong-won learns about Eom Tae-seong and offers help, but In-ji rebuffs him. Seo-yeon gets a grim warning. Later, the wife and ex-wife clash at a funeral.
Seo-yeon demands an end to their tangled relationship, and In-ji boldly confronts her. Meanwhile, a mysterious figure lurks near Seo Do-ha's apartment.
Shocked by the bloody corridor, In-ji steps into Do-ha's apartment with trepidation. Who or what will she find, and will she finally get closure?
After learning of Seo-yeon's betrayal, Jeong-won cuts their toxic ties. In-ji decides to end everything and invites Tae-seong for a decisive moment.
