Upon learning that he has to come out of retirement to steal 50 cars in one night to save his brother Kip's life, former car thief Randall "Memphis" Raines enlists help from a few "boost happy" pals to accomplish a seemingly impossible feat. From countless car chases to relentless cops, the high-octane excitement builds as Randall swerves around more than a few roadblocks to keep Kip alive.
On July 2, a giant alien mothership enters orbit around Earth and deploys several dozen saucer-shaped 'destroyer' spacecraft that quickly lay waste to major cities around the planet. On July 3, the United States conducts a coordinated counterattack that fails. On July 4, a plan is devised to gain access to the interior of the alien mothership in space, in order to plant a nuclear missile.
Grocery store clerk Simon occasionally sells drugs from his cash register at work, so when soap opera actors Adam and Zack come looking for Ecstasy on a quiet Christmas Eve, they are surprised to find Ronna covering his shift. Desperate for money, Ronna decides to become an impromptu drug dealer, unaware that Adam and Zack are secretly working for obsessed narcotics officer Burke.