Four years ago, the idol group Dreamboy was disbanded after being caught up in a certain scandal, sending them down the path of “failed idols.” Since then… Jaeyoung, once known as Happy of Dreamboy, has been struggling with financial hardships, working part-time as a deliveryman. One day, he hears that the group’s leader, Sugyeom, has passed out drunk at a club and rushes over. Meanwhile, Seungmin who shares the same stage name Happy but, unlike Jaeyoung, is now one of the hottest rappers and producers in the scene saves Jaeyoung when he collapses from photosensitivity syndrome at the club. Afterwards, Seungmin proposes they work together. “You know who I am, right? Let’s do a project together.”