In a world where humanity has colonized several planets and developed advanced technology, a mysterious force known as the "Skyfall" has begun to threaten the stability of the galaxy. The Skyfall is a phenomenon that causes entire planets to suddenly disappear, leaving behind only ruins and debris. Fear of being the next victim has created widespread chaos and conflict across the universe. To deal with the Skyfall, the Galactic Council has formed a special unit called the Skyfall Crusaders. The Crusaders are a group of elite soldiers and scientists who are tasked with investigating and combating the Skyfall and other dangers to the galaxy.