While working on the job at a construction site, Lee Cheol Soo gets an unexpected letter from the court, a divorce petition by his wife Oh Maeng Ja. Although he tries to find and talk to her, he can’t find her. What's worse is that all his three daughters are against him. Later, he makes up his mind and begins to write his response.

The three daughters rush to the hospital after hearing their father died. However, they see him alive but unconscious. Instead of feeling relieved, they only speak ill of him. Later, their aunt tries to tell her three nieces the whole truth about their mother but Cheol Soo interrupts them. Meanwhile, Gwang Sik catches her fiance cheating, and Ye Seul struggles with Tae Ri’s kids.

Oh Maeng Ja’s death becomes a murder investigation, and the detectives suspect each and every one of the family. Detective Seo questions the three daughters only to be astonished at their testimony, because they’re pointing their fingers at their father. However, Cheol Soo denies ever having anything to do with her death, until his friend Dol Se shows up at the police station.

Gwang Sik returns but gets taken in for questioning as the prime suspect in her mother’s murder. After getting questioned, she barely manages to step foot in her sister's house. Later, she looks for a place to open a restaurant. Meanwhile, Byeon Ho sneaks out to tend to his son no one knows about, and a woman named Taeng Ja gets released from prison.

A witness in Oh Maeng Ja's death claims she saw a woman at the scene of the crime, and all three sisters get taken in for questioning again. Cheol Soo, who learns of the witness' statement, urges Bong Ja to come clean to save his daughters, upsetting her deeply. Meanwhile, Bong Ja’s sister shows up at her fish store, and Gwang Tae goes to meet the mystery man she’s been flirting with online.

Cheol Soo moves into Bong Ja’s basement, but the suitcase he locked securely already got his daughters’ attention. Although he stops them from seeing what’s inside, it only makes his daughters suspect him even more. Meanwhile, Gwang Sik begs her still-legal in-laws to support the divorce she desires with Pyeon Seung after seeing their wedding photos plastered all over her diner.