Rusty lives with his dragon Cole and faithful friend Bo in the kingdom of Scrapland, a magical world completely made of scrap-metal. With dreams of winning the great knights' tournament, Rusty acquires a speedy engine for his horse Chopper that propels them into first place. But when the engine turns out to be stolen from ambitious Prince Novel, brave Rusty must redeem his knightly honor, save the kingdom and prove that true friends always stick together.