Introduction:

In the beginning of the movie, news of UFO sightings around the world appear.

Jack Bruno (Dwayne Johnson) is a cab driver in Las Vegas, who is picking up and dropping off passengers to the UFO convention at the Planet Hollywood Casino and Hotel. One of his passengers is Dr. Alex Friedman (Carla Gugino), a failed scientist who is giving speeches about legitimate scientific theories of UFOs and outer space.

The next day Bruno is approached by two large men telling him that Wolff would like to see him. After fighting them, Bruno drives off, later noticing two children, Sara (AnnaSophia Robb) and Seth (Alexander Ludwig) sitting in the back seat of the cab. They tell him they need to go to a certain destination and are willing to pay all they have ($15,000) to get there. They lead him to a run down house in the middle of nowhere. Meanwhile, Major Henry Burke (Ciaran Hinds) is searching for information on the two aliens that landed some days earlier.

When they arrive at the house, the children tell Bruno that they will be re-united with their relatives soon. Before leaving Bruno hears a crash coming from the house. He is startled to find them hiding behind a couch. Though grateful for his concern, the children tell him they must continue their journey without him, as they can trust no one. Nevertheless, Bruno decides to follow them, which leads him to the basement of the house. There the kids are pursued and attacked by a strange creature as they retrieve an object in a plant. They manage to escape this creature.