Responding to a gravitational disturbance in the Caelin system, the Primate Avenger is shot down and sinks to the bottom of the vast pink ocean covering the planet. But the monkeys don't drown for a very peculiar reason. Now these underwater monkeys must stop the two warring factions on the planet before they destroy their own world. That is, if they can survive a totally wild battle on surfboards, a sea quake and the molten lava racing for the downed Primate Avenger. Cow-a-monkey-bunga, dude!
