Ji Sun-woo finds a reddish strand of hair on Tae-oh's scarf and suspects him of infidelity. Paranoid about the situation, Sun-woo tries investigating Tae-oh, who behaves abnormally and lies about his work hours.

On Tae-oh's birthday, Sun-woo finds a phone and photos of a joint vacation of Tae-oh, Da-kyung, and Sun-woo's friends Ye-rim and Je-hyuk. Feeling betrayed, she grabs a scissor and heads towards Tae-oh. On Tae-oh's birthday, Sun-woo finds a phone and photos of a joint v

Sun-woo decides to leave Tae-oh's birthday party and goes home. In a spur of anger, she throws all of Tae-oh's belongings in a suitcase and is ready to kick him out, only for Tae-oh to go home drunk.

Da-kyung visits Family Love Hospital and is treated by Sun-woo against her will. During the session, Sun-woo tries to remain calm, but is shaken by Da-kyung's provocation and a shocking reveal.

Tae-oh - finds both Sun-woo and Da-kyung appealing - struggles to organize his feelings. Sun-woo goes to a divorce lawyer for a consultation, but finds his unfiltered advice unpleasant and disgusting.

Da-kyung taunts Sun-woo by confessing that she has an affair with a married man for two years. Meanwhile, Je-hyuk and his wife Ye-rim begin to sense the tensions between Sun-woo and Tae-oh.

Sun-woo moves with her plans to divorce Tae-oh, while Je-hyuk becomes more blatant about his crush on Sun-woo and reveals his desires to her more explicitly.

After seeing Tae-oh constantly struggling to choose between her and Sun-woo, Da-kyung tells Tae-oh that she will get an abortion and breaks up with him. Through Hyun-seo Sun-woo's spy continues to keep tabs with Tae-oh's affair and encounters an unexpected situation.

As Sun-woo becomes overwhelmed with doubt and anxiety, Tae-oh notices the changes in his wife's behaviour. Meanwhile. Tae-oh tries to get back with Da-kyung.

Sun-woo drives unannounced to Da-kyung family's house and invites herself and Tae-oh to a dinner with her husband's mistress and her parents. During the dinner, Sun-woo comes clean about Tae-Oh sleeping with Je-hyuk.

Sun-woo and Tae-oh continue to blame each another for the cause of their broken family, Tae-oh and Da-kyung discover through In-kyu that Sun-woo and Hyun-seo have been following them around.

The battle between Sun-woo and Tae-oh for Joon-young's custody begins. After getting back together, Da-kyung is frustrated that Tae-oh cannot give up on his son's custody. Sun-woo comes up with a plan to settle the divorce on her terms.

Two years after his divorce with Sun-woo, Tae-oh and Da-kyung return to Go-san with their daughter and host a combined housewarming and wedding reception. They invite everyone they know in Go-san to the party.

Tae-oh appears in front of Joon-young and Sun-woo in a relaxed manner, and Sun-woo grows more suspicious and anxious of what Tae-oh is scheming due to his seemingly strange actions.