Conan, Haibara, Ayumi, Genta, and Mitsuhiko come to "Maxima's Pizza," a pizza shop specializing in take-out. They participate in a campaign to guess the size of the pizza dough, and thanks to Genta's efforts, they get a piece of pizza. The pizzas are divided into five equal portions, placed in a special box, and Conan and his friends head home. On their way home, someone steals all the pizzas!