When one other Mega Shark returns from the depths of the ocean, world militaries go on excessive alert. Ocean visitors grinds to a standstill as everybody lives in concern of the insatiable beast. Out of choices, the US authorities unleashes the highest secret Mecha Shark challenge — a mechanical shark constructed to have the identical precise traits as Mega. A pair of scientists pilot the mechanical creature as they struggle Mega in a pitched battle to save lots of the planet. However when defective mechanics trigger the Mecha to go after people, the scientists should in some way information Mega to Mecha in hopes that the 2 titans will kill one another – or danger untold worldwide destruction.