Jae Pil used to run a karaoke with his mother. At some point, Jae Pil will receive text threats from an unknown person. Then one day, after a small fight with his brother, he turned violent. After that, he apologetically went back to his younger brother, however, he was unconscious. Then, he got the text threat again.
Even though Goo Hae-Ra is smart and beautiful, she is in miserable situation because of her family. Her older sister attempted suicide and her father passed away. The only way she can escape her situation is with money. She approaches Tae In-Joon. He is the second son of a shoe company owner. Tae In-Joon falls in love with Goo Hae-Ra.
Contract worker Lee Yeon Seo daydreams about teaching her manager a lesson, but accidentally acts out her fantasy on none other than top Hallyu star Kang Joon Hyuk. Thinking she killed him but afraid to be labeled a murderer, she takes him home and prepares to get rid of the body. But Joon Hyuk wakes up and seeing her preparations thinks he has been kidnapped by a murderous psychopath. Seeing no other option, she keeps him hostage so he doesn't turn her in to the police. How long can she keep him hidden and can she ever convince him she's not an evil person?
Oh Dan-Byul lost her parents due to her own mistake. She marries Joon-Young, but her husband passes away. Meanwhile, her mother-in-law, Ho-Duk, divorces because of her husband's infidelity and her sister-in-law, Se-Sil, returns to South Korea after divorcing her Italian husband. Now, these three women live together while overcoming their own personal problems and becoming important to each other.
Beyond simply reversing the gender roles and substituting a female for the male main character from the original film, My Boss, My Hero, this drama deals with the serious issues of personal growth and family relationships in contemporary society through its comedic approach to gangsters and the three main characters' growing friendship.