Maggie, 19, works at a lesbian/LGBT bookstore. Her mom's getting divorced and has invited herself to stay with Maggie. Maggie hasn't told her, she's lesbian. Her new girlfriend moves in as well.

On the hottest day of the year, an unknown virus spreads throughout inner-city Philadelphia. The infected victims, crazed by dehydration, begin attacking other residents of the neighborhood in gruesome ways. When the military is brou