At the same time, some investigations start to determinate the cause of the great explosion that devastates an entire city. After finding a video record from a police patrol from the same city, the investigators realize that the great explosion was made by a big flying unknown object. Then a great fear, treated just in science fiction movies, it becomes a reality: the planet has been attacked by alien forces. After this investigation, another attack occurs in the entire planet, all of them in big cities, and in every attack more records appear, showing the same type of flying object.