Rod is a young software salesman living a successful life in Silicon Valley. He meets up with old classmate and aspiring fashion model Nathalie and begins dating her. Things go well for the couple, with Rod receiving a large bonus that he uses to start his own business, while Nathalie is chosen as a Victoria's Secret model. As they grow closer, the couple remains oblivious to signs of something going wrong around them, such as unexplained wildfires and the carcasses of diseased birds turning up on beaches.
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.
A flock of sea eagles attack the coastal town of Santa Cruz, California. Why did the birds attacked? Who will survive?