Rising to fame with the viral phenomenon "Tiger Is Coming," Leenalchi faces severe internal turmoil following the departure of multiple members. Unable to release a new album for five years and losing even longtime friends from the band, non-gugak leader Jang Young-gyu searches for a path between traditional Korean music and popular culture. As an international contract in the United States approaches, Leenalchi hastily recruits new members and begins a precarious journey toward the global stage.