On Halloween Eve in 2071, a shocking crime suddenly occurred in a big city on Mars. A tanker exploded on the highway. People at the scene of the accident fell ill for unknown reasons, and the number of casualties exceeded 400. Such a large-scale killing seems to be caused by biological weapons of unknown origin. For this reason, the Martian government issued a bounty of 300 million yen for terrorists. Faye, who witnessed the incident, acted alone in an attempt to monopolize the bounty. Ed used hacking technology to find clues and acted together with everyone on the Bebop. The four people and one dog set out again, but they didn't know that the price of 300 million yuan was to fight against an unprecedented powerful criminal.