After the Russians' drilling operation awakens a Megalodon, a Cold-War robot, Kolossus, emerges from hibernation. Meanwhile, Dr. Alison Gray searches for a way to stop the massive underwater threat. The unstoppable Megalodon and the deadly robot will eventually clash, leading to a catastrophic battle.

Mega Shark vs. Kolossus
In a chilling turn of events, a long-dormant Cold War-era robot, programmed to eradicate all life, suddenly springs back to life in Russia, threatening global destruction. Meanwhile, a massive shark wreaks havoc on the planet, pushing humanity to the edge of disaster.