Li Nan's greatest skill in this life is that he has been an "air force guy" for twenty-five years without ever catching a fish. Until that night, he finally caught a big one... What he pulled up was not a fish, but He Dan, a female ghost who committed suicide by jumping into the river. What's even more outrageous is that his blood can actually burn ghosts.
From then on, three rural youths were marked by ghosts, and if they did not practice, they would die. The strange old man who lives in seclusion outside the village accepts three people as his disciples on the grounds of "giving you a way to survive." The fishing rod is a weapon, and fishing is cultivation.
From the centuries-old fish spirit in the river outside the village, to the Yin dragon in the River Styx in the underworld. Every time you swing the pole, you are risking your life. And the demon who tried to open the door to hell needed Li Nan's blood as the key.
This is not cultivation to become stronger, this is to survive.