Pontifex Rembrary, a divine figure, is transported to a new world while battling a devil. He wakes up in the body of Woo Yeon Woo, a struggling idol from an unpopular boy band. After a chaotic live performance, his unexpected charm and powers help revive the group's career. As he rises in fame, he must also face dark forces from his past, including mysterious cults and the return of the devil.