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.

In a temper, Meg, a cynical, overworked TV executive, rants about how the movies she produces lie, making you think dreams can come true, and tries to smash her favorite snow globe. Instead, it hits her on the head and knocks her out. When she comes to, she finds herself magically transported to a perfect snow-covered town like the one in her globe, married to a handsome woodworker and mother to two young children.