Noise Rhapsody measures the nation's stress index and delivers music boxes to spaces above the standard. At the same time the music box starts to play, the noise in the space becomes music, and people participate in the music by dancing and making sounds to relieve their feelings. "Dam," a friend of "Doona," chose suicide because she couldn't stand the stress and depression. Doona, who has lost someone like that, feels guilty that she didn't help. Knowing the existence of Noise Rhapsody, she has become obsessed with reducing the stress of others since she got a job. In this way, Doona became an excellent delivery worker for Noise Rhapsody. The stress of the characters in the movie is connected. Doona appears everywhere where stress occurs and helps them relieve stress, but the connection of stress is not easily broken. Doona, who was busy with too much work, ended up in a traffic accident…