On the planet Veldin, a young Lombax mechanic named Ratchet dreams of joining the heroic Galactic Rangers, but he is turned away. His life changes when he rescues a small defective warbot fleeing a factory where Chairman Drek of the Blarg is building a mechanical army. Ratchet names the robot Clank, and the two set out to warn the Rangers that Drek intends to destroy planets to build a new homeworld for his people. Teaming with the boastful Captain Qwark, the unlikely pair join the fight to stop the scheme.