Kang Poong-ho is a pest exterminator by day and a K-1/mixed martial arts fighter by night. He is a single father raising his 7-year-old son Kang San after the boy's mother, his first love Yoon So-yi, abandoned them to pursue her ambition of becoming a pianist. Despite life's trials, Poong-ho never loses his optimism and sense of humor. He meets and falls in love with Jeon Ha-ri, a bright and bubbly medical student from a wealthy family. An obstacle to their romance arises when they learn that Ha-ri's soon-to-be stepmother is none other So-yi and that it was Ha-ri's surgeon father Jeon Ki-suk who sponsored her piano studies abroad. As So-yi re-enters their lives, San is diagnosed with a brain tumor. Poong-ho is willing to go to any lengths to save his beloved son.

Huh Yi-jae
Jeon Ha Ri

Oh Ji-ho
Kang Poong Ho

Kang Sung-yeon
Yoon So Yi

Jeong Jae-soon
Lee Wal Soon

Ahn Do-gyu
Kang San

Shindong
Oh Chil Goo

Lim Ju-hwan
Min Hyun Ki

Kim Ha-eun
Cho Gyeong A
Min Wook
Min Joong Ho
The Emperor: Owner of the Mask61%
Mr Inbetween83%
Once and Again67%
SkyMed68%
Jewel in the Crown77%
Tell Me a Story71%
May I Help You?79%
Parenthood74%
Unchosen68%
Angel Eyes67%
Sullivan's Crossing80%
Fatal Attraction61%
The Newsreader75%
Blood74%
Bel-Air76%
Tyler Perry's Ruthless83%
Offspring69%
Dear X84%
Something in the Rain77%
Parish63%