Four fighters from different backgrounds come together to train under an ex MMA rising star and then ultimately have to fight each other and the traitor in their midst.

After their first adventure with the Hot Tub Time Machine, Lou and Nick are living very well off their ill-gotten gains, while Jacob still cannot rely on Lou to be a positive role model. When an unknown assailant breaks into Lou's mansion and shoots him, Nick and Jacob take him for another trip in the hot tub. They emerge in the year 2025, where they must figure out who shot Lou and prevent it from happening again.

Antoinette Vitrini, a volcanologist, confirms her theory of a long-dormant underground volcano after an offshore-drilling rig bursts into flames. Now, she must stop catastrophic amounts of magma from pumping out right under Miami, Florida.

Aliens attack Earth with deadly electrical tornadoes, and it’s up to a farmer, his smart high-school daughter and a tornado blogger to thwart the horrific invasion.