In the distant future, a devastating war once ravaged the land of Mirsha to ruins. When the land is about to recover from the devastation, the mobile citizens all encountered a mysterious virus called the "Etiolation Trinity", which an epidemic to break out and cause them to become mindless monsters called Bugs. Due to the fears of the virus, mobile citizens now live in three areas, each city 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 outrageously since the passing of the previous lord. To liberate the citizens from the Etiolation Trinity, a valiant hero named Liu Bei Unicorn Gundam steps up alongside Guan Yu Nu Gundam and Zhang Fei God Gundam to bring a new change to the world.