Employees working at a high rise building begin encountering a series of strange occurrences. Ken, a recent hire who attracts to the lovely, but spiritually harried Shan. Meanwhile, Pat is apparently terrorized by the evil demon who resides in the last stall of the woman's bathroom. And Richard, a mean boss of another company in the same building, wants to get rid of his long-time employee Mary and begins to suspect that his entire staff has become ghosts.

After years of increases in the greenhouse effect, havoc is wreaked globally in the form of catastrophic hurricanes, tornadoes, tidal waves, floods and the beginning of a new Ice Age. Paleoclimatologist Jack Hall tries to warn the world while also shepherding to safety his son, trapped in New York after the city is overwhelmed by the start of the new big freeze.