World militaries go on top alert, when another Mega Shark yields out of the depths of the sea. Ocean traffic grinds to a standstill as everyone lives in fear of this beast. Out of options, the very best Mecha Shark job -- even a mechanical shark built to own the exact characteristics Mega is unleashed by the federal government. A couple of scientists pilot that the monster because they struggle Mega at a pitched battle to save the planet. However, when mechanisms induce the Mecha to go after humans, the scientists must guide Mega to Mecha assured that the two titans will kill eachother - or risk untold destruction.