The Scuba Diving Murder Case (1)

Ran tricks her mother and father into going to the beach together. Kogoro, annoyed, leaves for the bathroom and returns with two girls named Kiwako Toda and Harumi Matsuzaki who invite the Mori family and Conan to lunch with the scuba diving club at the local college. After awhile, the group spots Kiwako drowning and rushes to save her.