Guo Mo, the former world's top killer, retired to the city to protect his daughter and opened a small bookstore. However, he discovered that he had a mysterious golden finger - whenever he fell asleep, he would enter a magical library containing all the lost secrets, peerless techniques, and ancient elixirs in the world. What's even weirder is that what he recited in his dream will materialize in reality.
Just when he thought he could live peacefully, a pair of real and fake daughters turned out to be real. The fake daughter Lin Wan'er came to visit with a lot of money, claiming to buy his bookstore to develop a commercial street; the real daughter Lin Xue secretly planned to seize the innate sword bone in his daughter's body. What's even more troublesome is that both women suffer from severe "confusion syndrome". They always do things by mistake, but they always manage to cause trouble for Guo Mo.
When the fake Qian Jin ordered the demolition, he mysteriously lost his memory the next day; when the real Qian Jin set a trap, he tripped and fell into the sewer. Guo Mo discovered that although the two villains were confused, they were always inexplicably close to the truth. And as he endorses more and more things in his dreams, an astonishing secret gradually emerges - this library seems to be inextricably linked to the origin of his daughter...
