The bounty hunters are out of food and stranded in a desert on Io after a "hit and run" incident. Ed and Ein head to town to find food. The duo get mixed up with an illegal mushroom dealer named Domino, and his enemies. After discovering he has a bounty on his head, Ed and Ein decide to take matter into their own hand and paws.

A package arrives on the Bebop and Faye flees, fearing it might be an explosive threat from debt collectors. Spike hastily opens the package to find a black box identified by Ed as a video tape. Fueled by curiosity, Jet decides to search for a player to view the tape which leads him and Spike to embark on a perilous journey through an underground museum on Earth.

The bounty hunters go after a band of "Starship Pirates" and fail miserably. The pirates scramble Red Tail and the Bebop by uploading a computer virus via harpoon. Meanwhile, Spike takes Swordfish to Earth to have it overhauled by Doohan. There, he receives a lead on the bounty heads. It is up to him to get the pirates but he may yet need the help of Doohan and his spirited assistant.

On the epitome of bad nights, Spike runs into a psychotic killing machine and barely escapes. Bob tells Jet that the killer, known as Tongpu, also known as Mad Pierrot, has been brutally murdering top ISSP members and anyone in his way. Ed receives an e-mail from the madman, a party invitation for Spike to visit a theme park on Mars. Predictably, Spike accepts the invitation.