Un avion est encerclé de volcans en éruption. Les passagers comme l'équipage doivent tenter de survivre mais ne peuvent pas se poser.

Nerdy middle schooler Tommy is forced take care of a baby dinosaur after his cloned science fair project hatches early. He quickly begins to think of the creature not only as a pet, but also as a friend. But when the dino escapes on the day of the fair, Tommy must figure out a way to get the creature back before greedy grown-ups get to the dinosaur first.