Hiroshima Theater Number One is a venerable strip club on the verge of shutting down. Theater head Kinoshita takes to the stage for the theater's final night and stands before famous strippers and mysterious young dancers to reminisce about the glorious past and his secret love affair with a certain dancer.

Elementary student Tanabe Kento is struggling to draw a map of his town for his summer vacation homework. One day, a fracas occurs involving a mysterious man, junkman. After that, Kento discovers a Hiroshima that he'd never known, and decides to draw a map of his very own.