Cowboy Bebop: Tengoku no tobira

The year is 2071. Following a terrorist bombing, a deadly virus is released on the populace of Mars and the government has issued the largest bounty in history, for the capture of whoever is behind it. The bounty hunter crew of the spaceship Bebop; Spike, Faye, Jet and Ed, take the case with hopes of cashing in the bounty. However, the mystery surrounding the man responsible, Vincent, goes deeper than they ever imagined, and they aren't the only ones hunting him.