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?

For months, Richard Montana has been giving drug lord Mario Gio hell. But it's only when he meets Gio's leggy blonde girlfriend, nightclub singer Lisa, that things get personal. And after Montana and Lisa have been in bed, things get absolutely deadly. Especially because the headstrong beauty has her own plans. Because only she is the key to Gio's next big deal. And Lisa wants the drugs, the dollars and Montana all to herself. And because that's the case, all hell breaks loose and Gio's killers go on the hunt!