Darby, the dizzying flow

Dan-i, the owner of a tea shop selling tea leaves north of the Yalu River,
is saved with the help of a man.
The true identity of the man who saved his life is a cold-blooded man who mercilessly cuts down female females,
Joseon general Seo Gyeol, who is called the cursed northern ghost.
He is cursed to drink only strong tea instead of water, and it is said that he takes children and uses them as Dadong to
brew his own tea and eats them... Can you stay?!