Zheng, the ‘Slaughtering Scythe Ghost’ who finds pleasure in killing.
He happens to have the exact same face as the Third Young Master of the Great Orderly Wooden Sword Hall, Mok Gyung-Woon…

“Become my body double. That way, I’ll let you out of this prison.”
“Will you give me that opportunity?”

‘Crack-!!!’

He kills the Third Young Master and decides to become the ‘real’ one. Can the fake Mok Gyung-Woon survive as the real one? The serial killer begins his new life as the Third Young Master of the Great Orderly Wooden Sword Hall.