The Night Cherry Blossom Route on Sumida River (1) Meitantei Conan : Season 1 Episode 692

Kogoro assists the police delivering ransom money to the Nihonbashi Post Office. When arriving at the post office, Kogoro is given a briefcase with further instructions. After Kogoro falls off a boat and gets sick, Conan and Ran begin investigating, but soon...they stumble upon a body!