The movie opens with an intense battle between Godzilla and Ghidorah. In the process the moon is fractured. An international coalition is formed to visit the moon and assess the damage. Monarch pushes their way into it, raising the suspicion of some astronauts. After investigating they discover Monarch had worked with the US government to establish an observation lab on the moon, but for unknown reasons. The moon landing is successful but the mission is abruptly ended and the astronauts are killed. It seems the moon was more unstable than previously thought. A piece has started moving into Earth's atmosphere. It lands the pacific, causing tsunamis. Godzilla and the other titans change their behavior. There is something wrong. Something else is on Earth. Colleagues of the dead astronauts pickup the investigation into Monarch. The moon is also hollow and has been holding something inside, another titan. Attacks begin on humans in Japan and the east coast of China. It's space Godzilla!