Nick is desperate, holed up in a cheap hotel, suffering from an ulcer and convinced that a local mob boss wants him killed. Desperate and terrified, he calls Mikey, his friend since childhood and a fellow gangster. So begins a long night…
A gang of boys under the Brooklyn Bridge are united by their common interest in break dancing. Some work as pizza delivery boys, hence they call themselves the "Delivery Boys". They form a dance team and enter a local break dance contest, sponsored by a woman's panty manufacturer. A rival gang's sponsor intimidates their employer into thinking she must keep the boys working so they won't be harmed. She gives the boys some "specialized" deliveries to make them late for the contest. The antics and calamities abound as the boys wrestle with her work assignments and getting to the contest on time.
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?
