During a fishing tournament, all the fishermen spread out to catch on their own. One of them turns up dead, but nobody was near them.

A seven year old movie star by the name of Kazuki Kinukawa comes to the Moore office to try and find his mother who abandoned him at the office. His reasons are to tell his mother he will not give her any money now that he is famous. Conan finds out that the kids mother is at Atami due to the old dirty postcards she sent him. Kazuki reveals that he remembered that his mother had a mole near her breast. A man who is trying to confirm the rumor that Kazuki's father is a murderer is found dead in a tub.