Li Jianang is an expert in ancient well restoration, and his ancestors have been well diggers for generations. One day, he received a strange business - to repair an ancient well that had been dry for hundreds of years. This well is located in a remote mountain village. The villagers call it "Well Gate". Legend has it that it is a passage connecting the Yin and Yang worlds.
When Li Jianang went down to the bottom of the well, he found that the walls of the well were covered with strange spells, words he had never seen before. What's even weirder is that the moment he touched the spell, a dark red mark appeared on his wrist - it was the tattoo pattern of an ancient ethnic group. That night, he had a dream: hundreds of years ago, his ancestors were buried alive in this well because they mastered a shocking secret - the Well Door Curse can open the door to time and space.
After waking up, Li Jianang found that he could actually see things that others could not see: the ancient souls wandering at the bottom of the well, the ancient streets that overlapped with the modern city, and the mysterious people who had been guarding the well. He realizes that he is involved in a curse that spans thousands of years. The key to undoing the curse is hidden in his blood. Once the well door is opened, the past and present will overlap, and countless dead souls will return to the world. He must find a way to seal the well door before July 15th, otherwise he will become a lonely soul in the well.