In the corner of this bustling city, there is an ancient bookstore called "Wangyouzhai", owned by Chu Ci, a seemingly gentle and elegant single father. However, whenever night falls, he will become the executor of another identity - a contractor who makes a deal with a forbidden existence.
Three years ago, an ancient bronze book called "Extraordinary Contract" was bound to his soul. It does not provide invincible magical powers, does not give away billions of wealth, it only issues a series of weird and bizarre "commissions". The object of the commission is a "foreign object" hidden in the world - it may be a crying bride wandering in an abandoned theater, or it may be a hungry ink demon parasitic in an ancient painting.
After completing the commission, Chu Ci can obtain an extraordinary thing called "salary" to protect the only light in his life - his daughter Niannian. Because he knows very well that his daughter, who has special psychic qualities, is a beacon that attracts those "foreign objects" to spy.
The price of failure is that he or everything he values most is ruthlessly "pawned" by the contract.
In order to protect his daughter's smile, Chu Ci wandered on the edge between reality and abnormality, using his mortal body to play games with ghosts and gods. He is not a hero or a savior, he is just a father who had to step into the abyss in order to let his daughter sleep through the night.
