- HD 1080
- Runtime: 120m.
- Status: Released
0
- Languages: ko
- Country: South Korea
- Director: Choi Sung-hyun
- Stars: Lee Byung-hun, Youn Yuh-jung, Park Jeong-min, Han Ji-min, Kim Sung-ryung
- keywords: pianist
- Production_studio: CJ Entertainment, JK Film
- Slogan: Off-tune brothers unite!
- The Keys to the Heart is featured in the top rankings of 2018
- #32 in Top Comedy Movies of 2018
- #59 in Top Drama Movies of 2018
An older brother is a washed-up boxer. His younger brother is a genius pianist with physical disability. The brothers make up through their mother who is full of stories of her past.