"After a catastrophic crash on an unknown planet, pilot Mills quickly discovers he's actually stranded on Earth... 65 million years ago. Now, with only one chance at rescue, Mills and the only other survivor, Koa, must make their way across an unknown terrain riddled with dangerous prehistoric creatures in an epic fight to survive" --Container.

Seven years after the Monsterpocalypse, Joel Dawson, along with the rest of humanity, has been living underground ever since giant creatures took control of the land. After reconnecting over the radio with his high school girlfriend, Aimee, who is now 80 miles away at a coastal colony, Joel begins to fall for her again. As Joel realizes that there's nothing left for him underground, he decides to venture out to Aimee, despite all the dangerous monsters...

Now adults, Theodore Templeton and his estranged brother take a magical formula that transforms them into babies for 48 hours. Together, they must now go under cover to prevent an evil genius from turning fellow toddlers intro monstrous brats.