Dr. Agasa invites the kids to the Peach Sunday cafe for a treat. Since they get there first, the kids order without him. Conan finds the other customers more interesting than the menu, studying one customer's odd behavior. Genta eats too much too fast, and has to use the rest room, which is already occupied by the strange customer. The fun is spoiled when a delivery truck crashes into the restaurant, killing the strange customer's aquaintance.