The Heartful Singers is a new reality show following a group of actors who start a new choir. Two acting legends - Kim Young-ok and Na Moon-hee - and their fellow actors and friends challenge themselves to something they've never dreamt. They don't have the highest pitch or outstanding vocal skills, but the voices aging with the experience will carry the stories and lessons of life. Kim Moon-jung, the best music director in the business, and Choi Jung-hoon, a singer-songwriter loved by the young generation, join as the co-directors to help the actors perfect the harmonies.