Somewhere in the ocean, a ship is picking up a powerful electric current. The electric charge becomes so powerful that the ship begins to explode from the overload and the unfortunate blokes on board need to escape, abandoning the boat... because the water must be a lot safer. Deep in the depths, a mysterious creature swims. Could it possibly be the source of the electron catastrophe?

Back on the Calico, Brock the African-American with an afro is swabbing the deck, and Godzooky is getting in the way as usual, eventually managing to smash Brock's bucket. Brock abandons his work for a while to visit the wheelhouse. The members of the Calico have just found out about the unusual phenomenon that affected to the electrically beleaguered boat, which happened near a place called the Valley Trench. Captain Majors and the others decide to go check it out because they think that the underwater lightning bolts might be a valuable new energy source, and also perhaps due to their suicidal proclivity for deliberately putting themselves in dangerous situations.

After arriving, Quinn and Brock get into a big, round, red bathysphere to go under and check out what is going on. Godzooky, now quite acquainted with swimming and officially a triphibian monster, goes swimming down with them and makes faces in the window, but eventually paddles back up rather than test the limits of his lung capacity.

The instruments of our heroes pick up a strange power source—that moves. Turns out the megavolt monster is a four legged, saurian/amphibian beast with a beak with two tusks as well as two forward thrusting horns on the top of its head, as well as a long fish tail and a forked tongue. It shoots lightning bolts at the bathysphere, which cuts the submersible's line to the ship. The megavolt monster then proceeds to wrap itself around the Calico for some reason. Captain Majors promptly calls Godzilla, who spends a long time roaring, and Pete sends Godzooky to fetch the bathysphere.

Godzilla, sensing that the time of attack has come, assaults the megavolt monster and grasps the monster from behind, wrestling and choking it until the lightning leviathan shocks him into letting go.

Meanwhile, Godzooky swims down into the trench. The bathysphere is almost to the bottom—and suddenly comes out into a huge pocket of air clinging to the ocean floor, thus crashing onto dry land!

Soon Quinn and Brock exit the vehicle and are separated from their bathysphere by two smaller megavolt monsters. Brock and Quinn run for a cave, but the monsters create a wall of electricity, blocking their exit. Quinn calls Carl and Pete for help, and then Godzooky arrives on the scene, falling from the sky between the monsters and our heroes. The electric beasts inexplicably beat a hasty retreat, despite being several times Godzooky's size.

Apparently they left just to take a brief walk together, and thus return in short order. Godzooky tries to defend himself with his smoke-breath gifts, but instead manages to merely cover himself in a noxious cloud. The monsters shoot energy blasts at him, and Godzooky hides in the cave with the humans. Our hapless heroes are stuck with no escape, with the monsters just waiting outside.

On the surface Godzilla picks up Pete and Carl and takes them underwater in his airtight fist so that they can breath. Meanwhile, the megavolt monsters are still blasting energy rays into the cave, threatening to cause a collapse. Then, quite suddenly, the blasting stops.

The megavolt monsters have apparently run out of power, but some glowing rocks recharge them in a matter of moments. Quinn and company run out of the cave and watch the recharging process from a nearby sand dune, then are chased by the revitalized beasties back towards the cave. But, once again arriving with an incredible sense of timing, Godzilla pops into the great underwater bubble world and announces himself with an excessive number of growling roars.

The Megavolt monsters, not to be outdone, bellow a great deal as well. The underwater adversaries shoot energy out of their tails at Godzilla, and Godzilla blasts at them with his fire breath.

Meanwhile the humans begin to hatch a plan to try to neutralize the glowing rock, the source of the overgrown electric amphibians' power. Not that they ever actually do anything.

Godzilla's titanic struggle continues as he hugs one of the monsters, then goes to fetch a tree trunk that just happens to be near the energy rock, and tossing rocks at the beasts which they blast with their potent energy beams.

Godzooky takes a different tact and uses the aforementioned tree trunk as a lever to catapult the energy rocks into the air, which manage to puncture the giant underwater air bubble and allow water to rush into the air bubble. Godzilla roars a lot, and the water fills the area—flooding everything except where the humans are hanging out.

Godzilla takes the bathysphere freshly filled with helpless humans to the surface. On the way, the really big megavolt monster from before gets in the way and shoots Godzilla with his tail. Godzilla engages in a gargantuan struggle with the greater lightning leviathan until suddenly, out of power, the megavolt monster shrinks and Godzilla once again proves to be the better beast in underwater fisticuffs.

In the end, the humans lament the loss of the glowing rocks power source—and then make a joke about harnessing the powers of Godzooky, who is pushing the ship through the ocean for some reason.