In a distant future, a devastating war once ravaged the land of Mirsha to ruins. As when the land is about to recover from the devastation, the mobile citizens all encountered an mysterious virus called the "Yellow Virus", which an epidemic broke out and caused them to become mindless monsters. Due to the fears of the virus, mobile citizens now live in three areas, each cities all sealed up in walls and pray that the Trinity, a mysterious energy can save them. But behind one of the walls, Lord Dong Zhuo Providence of Luoyang has been acting in an outrageous manner since the passing of the previous lord. In order to liberate the citizens from the Yellow Virus, a valiant hero named Liu Bei Unicorn steps up alongside Guan Yu Nu Gundam and Zhang Fei God Gundam to bring a new change to the world.