The Ranger teens hang out at Angel Grove Lake, where Rocky is working as a lifeguard. Lord Zedd is inspired by a young boy named Dougie's fear of monsters in the water, and recreates some of his (and Rita's) more sinister water-based monsters. Slippery Shark, Piranhtishead, Toxic Goo-fish, and Commander Crayfish are reborn to wreak havoc. Even if the Rangers manage to defeat these monsters again, can they stop Zedd's newest creation, Tube Monster, the white & blue stripped innertube-based monstrosity? And can Dougie overcome his fears to save Bulk & Skull's lives?