One day during middle school, while impressing the local kids at the park with his soccer skills, Shinichi meets a strange man asking people if they saw him at the park three days ago. His name is Kouichi Akimoto, and he is the prime suspect in his grandmother’s murder. At the time of the killing, Kouichi was asleep in the middle of the park following a drunken night with a friend, making it impossible for him to be the culprit, but there’s just one problem: there’s no one to confirm his story! Determined to help the man, Shinichi begins to investigate. But when his only lead – a woman walking a large black Labrador – hits a brick wall, it seems his inquiry is back to square one. Can the rookie Shinichi figure out the truth of the matter and get Kouichi his much needed alibi?