阿拉伯大陆板块的突然移动，引发了强烈的大地震，同时带来了海啸，这样的威力不仅摧毁了附近执行任务的战斗机，甚至掀翻了航空母舰。剧烈的大陆移动也导致天气变得越来越不稳定，尤其是夜幕降临时温度急剧下降，寒冷突然来袭，全球陷入一片恐慌与混乱之中。美国琼斯一家此时正在埃及度假，逢此浩劫的琼斯试图逃往安全的区域，希望有人能帮助他们一家度过此次劫难。地球再次迎来一个新的冰河时代，狮身人面像、金字塔、撒哈拉沙漠都覆盖在皑皑白雪之中。

Flight 42 was on its way, when it comes across an unidentifiable storm. Realizing they must go through, find themselves in France, 1940, World war II. A young soldier (Robbie Kay) tells them they are in the middle of a war zone. Dodging bullets and bombs the flight will attempt to make it back to modern day, without changing history too much.

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.