After being told that he was destined for great things, Chiro goes through the outskirts of Shugazoom City, where he stumbles upon an abandoned giant robot. Inside he found five robot monkeys, and he accidentally activated it and the robots are awakened and Chiro becomes endowed with the Power Primate. Now he and his new friends must fight off the Skeleton King, who recently found out that the robots were still intact, and plans to use them for his plans of universal domination.
