Case Closed 9 features story and art by Gosho Aoyama.

The Junior Detective league takes action! While playing hide and seek, firstgrader Amy discovers a chopped off head. Will Conan and friends be able to save Amy from a serial murderer? And when Richard Moore P.I. attends a reunion of his college friends, one of them ends up with a bullet hole to her temple and a gun in her hand. Was it suicide - or murder?!

Later, Conan, Richard, and Rachel attend the birthday party of the daughter of a wealthy financier. But Conan's deductive skills are put to the test when the birthday girl ends up missing and a dead body turns up.