It's 2016 and the end of the world. Jesus returns to earth, first appearing to a reluctant young male Palestinian terrorist, pressured by his family, about to suicide bomb a temple. Christ explains that he is the chosen one, to help him warn the world of their impending doom and need to repent. Christ is a little bit darker-skinned than often depicted and is a skilled communicator, even to a modern audience.
They start locally and eventually decide that the best way to broadcast their message to the most people in time for the apocalypse is to travel to Hollywood. Hilarity naturally ensues. They preach to various people in various situations along the way, and learn, as the audience does, that the people you'd expect aren't always the ones most receptive to Christ's message.
Christ eventually manages to get his time on international TV in some way, and there's a powerful summarizing speech, as the camera cuts to different people around the world, some of whom we saw earlier, and their reactions. The resolution is open-ended.