The residents of a New York apartment building are shocked when one of them is shot during a burgulary. They decide to hire a security expert to patrol the building, but he seem a little over-committed to his work.

Three young children accidentally release a horde of nasty, pint-sized demons from a hole in a suburban backyard. What follows is a classic battle between good and evil as the three kids struggle to overcome a nightmarish hell that is literally taking over the Earth.

When Dennis Cooverman gives the commencement speech at his graduation, his friend tells him to let it all out. So he proclaims his love for Beth Cooper the head cheerleader, and reveals things about everyone in the graduating class as well as some other people. Later Beth confronts him and he invites her to a graduation party at his house. And to his surprise she and two of her friends show up. But also some of the people he offended with his speech. And one of them is Beth's boyfriend who she just broke up with. So they all get in Beth's car and drive away. And what follows is wild adventure.

Brad, Steve, Hue, and Marvin are four get-nowhere boys who are forced into summer school, ending up at Cockswell Academy under the supervision of Principal Arsenault. The boys play a game where they earn points for every girl with which they score. On misadventures of their own, they decide to go for the ultimate 100-point score, Mona Lott, the new French teacher. But when they're unable to get a shot at her, they end up in the unforgiving clutches of the principal. After all is lost, they take one final chance during the school's anniversary celebration.

Billions are dead and the few that are left start to realize they are not alone. Initially when the dead begin to rise, they are not very threatening. However, in a short period of time, the lurching bodies begin to get their most basic senses back and this makes them much more dangerous. When the dead become attracted to light and sound, the survivors have no option but to live in silent darkness.