Busking band 'StoneHeart,' which suddenly lost its place to perform due to the enforcement of the 'Street Performance Decibel Restriction Act.' When Samuel, a vocalist, was cast alone and withdrew, the remaining members, Soon-dol, Seok-wun, and Bau, gathered in their home for a discussion. However, even Seok-un declares that he will quit the band and conflicts with Soon-dol. Then someone knocks hard on the door outside, and soon finds out that zombies are out there. They are isolated in the home. Even in such a situation, Soon-dol continues to dream of music, and Seok-un cannot understand him.