There used to be a small island beyond the south of the town where you live. The name of the island is animals paradise Animal Land. One day, a murder case occurred in this quiet and peaceful village of peace. The victim is the owner of the Concon Jewelry Store, the fox Gonkichi. You received a report and started investigating with the police dog Oidon.

The game plays out similarly to Portopia Satsujin Renzoku Jiken and others similar detective games. You select various commands in the menu to investigate crime scenes and quiz suspects.