COWBOY BEBOP: THE MOVIE - KNOCKIN' ON HEAVEN'S DOOR

As the Cowboy Bebop crew travels the stars, they learn of the largest bounty yet, a huge 300 million Woolongs. Apparently, someone is wielding a hugely powerful chemical weapon, and of course the authorities are at a loss to stop it. The war to take down the most dangerous criminal yet forces the crew to face a true madman, with bare hope to succeed. (Source: Anime News Network) — Description from AniList community (anilist.co).