On Doraemon's birthday, Nobita and his friends were enjoying an adventure movie in which Doraemon, dressed as a legendary treasure hunter, headed for the "Castle in the Sky" in search of hidden treasure. To celebrate his birthday, Dorami lent them a "Movie Can," a secret gadget that lets them experience various adventures as the main character in the movie.
Wanting to try it themselves, Nobita and his friends each chose their favorite can and entered the world of the movie. Nobita became a righteous security officer in a Western movie, Shizuka a skilled agent in a spy movie, Gian a skilled bodyguard in a period drama, and Suneo a sci-fi action hero, and they each enjoyed their own adventures.