Mars.  Days before Halloween 2071.  Villains blow up a tanker truck on Highway One, releasing a deadly virus that kills hundreds.  Fearing a bigger, even more devastating biochemical attack, an astronomical reward is offered for the arrest and capture of the person behind the destruction.  On the space ship "Bebop," Spike Spiegel and his crew of bounty hunters (Jet Black, Faye Valentine, Ed and Ein) are bored and short of cash.  But with the news of the reward everything changes.