Itaewon Class tells the story of ex-convict Park Sae-ro-yi (Park Seo-joon) whose life has been turned upside down after he gets expelled from school for punching a bully and his father is killed in an accident. Following his father's steps, he opens his bar-restaurant DanBam (Sweet Night) in Itaewon and, along with his manager and staff, strive towards success and reaching greater heights.