When physicist Lin Yuan woke up, he found that he had traveled to the Terra Hive in Warhammer 30k. There is a fragment of the Golden Throne in his body, and memories of the future echo in his mind - the Horus Heresy, the fall of the Empire, and the Ten Thousand Years of Dark Ages.
He knew the secrets of the Emperor, the fate of the Primarchs, and the true names of the Four Gods of Chaos. But he also knows that in this universe full of deception and corruption, prophecy itself may be the most dangerous weapon.
Every time you peek into the future, you are losing your own memory. Every time the power of the fragment is used, it is being assimilated by the throne.
He must find the way to the light before he completely becomes "part of the throne" - even at the cost of burning himself and becoming the last watcher of mankind.