Three students have disappeared from the town of Iwatobi within the past two months. Being unable to locate them, the local police force requested assistance from the Tokyo Police Force to solve the case. As the famous private detective, Mouri Kogoro drags his daughter and Conan along to Iwatobi to investigate. Meanwhile, Hachi succeeds at winning another round of Jan-Ken-Pon with Joker, he decides to go on a holiday at Iwatobi along with Spade, Queen and Akai Tsubasa. When hE stumbles upon an unexpected discovery, Hachi wonders if this trip is a vacation or a murder investigation. Detective Conan x Kaitou Joker x Free! Iwatobi Swim Club crossover.