Rocky, Colt and TumTum has to battle with an evil toxic waste dumper in order to save their friend Joe and a regional Indian tribe. The 3 Ninjas has to help find the dad of Joe and discover a disk which contains signs which may stop the landfill that's destroying the community. No matter how the man owns the town and he controls the police and even the mayor. They have to fight renegade cowboys and a motorcycle gang within this ninja adventure.