How Did I Become a Sword Immortal?

After ten years of drifting, Lin Yu is an ordinary actor who turns out to be the supreme Sword Ancestor reborn from Lingjian Sect. After the main cast of the 'Record of Cultivation in the Void' production strikes, they find Lin Yu as a substitute. Rushing to the sect with the script, he discovers actors of world-class talent, unaware that he has accidentally arrived at a hidden immortal sect by mistake.