Ran believes her mother is having an affair with another man after finding a picture of her with another guy. She and Conan decide to get down to the truth, and spy on her and the man while they are at a restaurant, but Conan figures there is more to the man than meets the eye.

An old man is injured and points at Genta, who was practicing kicking a soccer ball in the same area. Is Genta the true culprit behind the injury?