The agents have a new case, this time one involving the "Midnight Murderer," a villain who strikes only at midnight. Agent 314, the agency's leading detective, is dispatched to London to solve the case, accompanied by his new side-kick, Agent 999. Using only their wits and tools provided to them by Inventor 12, along with plenty of suspects and an increasing number of murders, will Agent 314 and Agent 999 solve the murders before it's too late?