Akita Oga Mystery Annai: Kogoeru Ginreika

You've been chasing the leader of a special fraud group that's expanding its influence. You and partner Ken, a junior detective, succeed in arresting him after a stakeout. As a result of a house search, you discover the existence of the group's leader, Zero, and where he is hiding out. You and Ken head to Akita prefecture to arrest "Zero". With the help of the local police, you find Zero and hunt him down. However, the chaotic investigation eventually leads to the confusing investigation eventually leads to the truth of a cruel case that went cold in the past. The forgotten memory of the flower is quietly waiting for the time of revenge.