In Chicago, USA, an incident occurs in which "Shards of Tesla" seems to have been used intentionally. Three out of four Mafia "Corad Family" executives were electrocuted one after another by lightning strikes. Peony and cars fly to Chicago to find the "Shards of Tesla" that manipulates lightning and the assassin who owns it, commonly known as "Prigiera". While continuing to scout the Collad family, the peony who was involved in the conflict with the rival organization "Black Bloc" is in danger.