Daybreak finds 17-year-old high school outcast Josh searching for his missing girlfriend Sam in post-apocalyptic Glendale, California. Joined by a ragtag group of misfits including a pyromaniac 12-year-old Angelica and Josh's former high school bully Wesley, now turned pacifist samurai, Josh tries to stay alive amongst the horde of Mad Max-style gangs (evil jocks, cheerleaders turned Amazon warriors), zombie-like creatures called Ghoulies, and everything else this brave new world throws at him.
