Kindaichi and Mioki have been reminded a case about diving when they are drinking in the cafe. When a diver jumped off from the springboard, she was interrupted by Hajime's words and lost her normal control before falling to the water with great splash. She was sent to the hospital for her uncomfort. Hajime thought that it was a murder planned from another diver that had dislikeness of the victim. The killer regretted for mistaking the diver and cried.