Cannon Busters follows the adventures and exploits of S.A.M, a high-end friendship droid who's joined by a quirky, discarded maintenance robot and a brash, deadly fugitive. Together, the unlikely trio embarks on an unforgettable journey in a fantastic and dangerous world in search of S.A.M's best friend, the heir to a kingdom under siege.
In Happy Lucky Market Town, Philly sends Casey off to buy supplies while he goes after the legendary (and currently very drunk) ronin known as 9INE.
While 9ine, Sam and Casey enjoy a night out on the town, Bessie breaks down and Philly finds himself communing with nature extremely closely.
After arriving in a dump town called Zenith, Sam puts her friendship lessons from Philly into practice. Casey meets a droid with a morose outlook.
Philly heads to Madura City with the droids to pay a bar tab, but when they arrive, they find a ghost town -- and one very unfriendly threat.
With Kelby captured aboard an airship and Philly in close pursuit, Sam's Cannon Buster programming takes over. But can a friend be an enemy.
Sam and Casey arrive in Balloon Town not knowing where to go next. They're hoping Philly the Kid can help them despite the bounty hunters on his tail.
The trio reach Gara's Keep, but things are strangely quiet. Undeterred, Sam insists on going in, convinced that she'll finally see Kelby again.
In Squeaking Springs, Sam works as a waitress in a bar and meets a kid named Jojo while Philly finds himself in jail for murder.
Masked fighters attack Kelby and Odin. Lady Day continues to track Philly, and dispatches a droid to find a bounty hunter named Jojo.
When Bessie breaks down, the trio make a deal with Mama Hitch for repairs. Sam dreams of the last time he saw Kelby, the night Botica was atacked.
Mama Hitch prepares to carve up Philly's corpse while her sons try to strip Bessie for parts. The magician reveals his true identity to the King.
On the run from a giant crab, the trio falls into a deep pit, and are welcomed as saviors by the strange beings living there. But there's a catch.