You are Killer Bean, a rogue assassin who takes out the trash in this world, one bullet at a time. The procedurally generated story changes every time you start a new campaign in this first person/third person, roguelike shooter.

The game has no definite plot due to it being generated procedurally. Because of this, the game is semi-canon to the Killer Bean Forever timeline. However, the main objective will always be shutting down the Shadow Agency. The game takes place on Shadow Bean Island, a lawless remote island far away from Beantown.

The Shadow Agency is headquartered in the island, including its Shadow Beans. The island also contains cities and outposts. In the game, the island is inhabited by 3 factions: Bad Beans, Mercenaries, and Shadow Beans. In each generated story, the Bad Beans or Mercenaries might align with Killer Bean.