Bill, an independent film director, discovers waitress Gloria in a Hollywood eatery and casts her in the lead role of Kim in his new film, ''Sunset Dreams'', which is financed by his friend Rod, a Silicon Valley entrepreneur, and Rod's wife, Nathalie. Shortly into production of ''Sunset Dreams'', a toxic rain falls on Hollywood which causes preserved killer birds and cavemen to emerge from the La Brea Tar Pits and zombies to come to life in a nearby cemetery. Bill, Gloria, Rod and Nathalie make their way around Hollywood with a dwindling band of survivors, fighting off the various threats before the birds eventually cease attacking and fly away.