In his basement in San Francisco, boy-genius Quinn Mallory unlocks the doorway to an infinite number of Earths. During a test run, Quinn invites co-worker Wade Welles and his teacher Professor Maximillian Arturo to see his new invention. But an increase in power and an early departure leave all three, plus a washed-up soul singer named Rembrandt "Crying Man" Brown, lost in a parallel world. Now they must "slide" from world to world, not only adapting to their changing surroundings, but also trying to get back to their world. Will they ever make it home?

The real-life struggle to contain the environmental and financial damage caused to Alaska by the oil spill from the Exxon Valdez is dramatized.

After surviving an attempt on his life by his former partner, officer Cliff Garrett (Norris) exacts revenge on those who wronged him by going undercover as a hit man. He works to gain the reputation and trust needed in order to be accepted by the burgeoning Seattle-area criminal underworld, but it is all done in order to take it down from within.