The Fist of Blue Sapphire

The world's largest blue sapphire, the 'Blue Sapphire Fist', is said to have sunk when a pirate ship sank in the late 19th century off the coast of Singapore. A local millionaire plots to recover it, and when it reappears at a Singaporean hotel exhibit, a murder takes place and a calling card of Kaitō Kid is found at the scene. Still in Singapore, Makoto was in the midst of participating in a martial arts tournament where he is joined by Ran and Sonoko to encourage him. Conan is stuck in Japan as he does not possess a passport. However, Kaitō Kid wants to use him to get the sapphire and kidnaps him to take him to the city-state. There, Conan must obey him if he wants to return to Japan; he has his glasses, wristwatch and clothes confiscated, among other things, and must conceal his real identity. Ran, who does not recognize him, asks him his name and Conan improvises the name of "Arthur Hirai". Disguised as Shinichi Kudo, Kaitō Kid finally manages to get information about the sapphire that is kept in the underground vault of a mansion. During his intrusion into the premises, he is trapped and comes face to face with Makoto. Leon Lowe, a detective and behavioural psychologist from Singapore, is also searching for the legendary secret treasure buried in the seabed and is in rivalry with Conan and Kid.