In the Sixth World Era, My Mission to Save the World Begins with Death.

The vast six realms are facing the final disaster. An invisible shadow envelopes all things, wanting to turn all living beings into material resources. When life hangs on a thread, a soul from another world - modern astronaut Feng Yun - accidentally falls into the dead body of a monk, witnesses the gods in the depths of the dream, and signs a salvation contract. He is the mortal enemy of the Immortal Path, the variable of the Demonic Path, and the "executive" chosen by the gods. The only way to survive is to find the five fragments of the "Key Yu" scattered in the six forbidden areas and long forgotten by the world, and reforge the blade that created the world. Relying on the astronaut's mind and technological thinking that are beyond the times, Feng Yun must make his way step by step in this murderous world of cultivating immortals, dealing with immortals, demons, and ghosts, uncovering many fogs, and finally facing the all-devouring alien enemy.