A high school science teacher is the butt of all his students' jokes, until their bus is hijacked on a school trip. But something more sinister lurks beneath the surface: he's building an atomic bomb in his apartment.

A shady music mogul brings together two wannabe stars—punk rock rebel Kan and new-wave crooner Shingo—and transforms them into the Stardust Brothers, a girl-friendly, silver-jumpsuited, synth-pop sensation. Along with their #1 fan, who herself dreams of a music career, the duo rockets to stardom.

During his travels, Tora-san gets drunk with an old man in Kyoto. Though Tora-san never fully comprehends his importance, the old man is a Living National Treasure ceramist. At his home, Tora-san makes a good impression on the old man's maid, who apparently falls in love with Tora-san.