A new breed of aggressive, ravenous sharks cracks the frozen ocean floor of an Arctic research station, devouring all who fall through. As the station sinks into frigid waters, those alive must fashion makeshift weapons or suffer the same fate.

Massive earthquakes open the Arabian tectonic plate, resulting in unstable weather and freezing temperatures that will be unsurvivable by nightfall. Attempting to reach safety, a vacationing family in Egypt must battle the rapidly cooling temperatures that usher in a new Ice Age, covering the Sphinx, Pyramids, and Sahara Desert with mountains of snow.

International Flight 42 is on course, when all of a sudden a massive and weird storm crops up around the plane. This sends the plane back in time to the year 1940- smack dab in the middle of WWII! Now, the crew and passengers must not only find a way back to their time, but fight off the Axis powers.

When another Mega Shark returns from the depths of the sea, world militaries go on high alert. Ocean traffic grinds to a standstill as everyone lives in fear of the insatiable beast. Out of options, the US government unleashes the top secret Mecha Shark project — a mechanical shark built to have the same exact characteristics as Mega. A pair of scientists pilot the mechanical creature as they fight Mega in a pitched battle to save the planet. But when faulty mechanics cause the Mecha to go after humans, the scientists must somehow guide Mega to Mecha in hopes that the two titans will kill each other – or risk untold worldwide destruction.