TULIP (The Undercover Line of International Police) is a New York-based international police force in direct opposition to the criminal organization TIGER (The International Group of Espionage and Revolt). Shunsuke Dan is agent Spycatcher J3 of the TULIP Japan Branch. Spycatcher J3 stands against TIGER's machinations.

Two young crooks who scam betters in the race track are employed by a yakuza gang called the Shigemori Syndicate to steal a shipment of handguns from a rival gang. Somewhere in the process they find themselves on the run from their own gang and one of them becomes himself romantically entangled with the boss's girlfriend. An ambitious underboss of the gang offers them a way out if they murder the previous boss but things don't turn out as planned (for everyone).

It tells the story of a couple who fall into a trap set up by a sinister organization. One of them is a guy who is framed for the murder of his lover. The other is a woman pick-pocket who is entrapped by the organization's schemes involving their crimes. Fate places them together, and they start to investigate the prostitution ring run by the organization...