Jay Baruchel arrives in Los Angeles to visit old friend and fellow Canadian actor Seth Rogen, who invites him to a housewarming party hosted by James Franco. There, Jay is uncomfortable at the crowded party so Seth accompanies him to a convenience store for cigarettes. When beams of blue light come down and suck numerous people into the sky, Seth and Jay flee back to James' house and find the party unharmed. An earthquake then strikes and the crowd rushes outside to which a sinkhole suddenly opens in James' yard, swallowing several attendees. Seth, Jay, James, Jonah Hill and Craig Robinson (actor) run back inside the house. Jay tells the remaining partygoers that the earthquake has destroyed most of Los Angeles. They then take inventory of their supplies, set up a ration system, board up the house and await help.