Shen Yan and Su Ling, a folklore consultant who can uncover illusions, and a famous Kun Opera actor who can talk to the soul of the opera.
Weird things happen frequently on the ancient stage late at night. A sadistic performer appears on stage to sing and cry, but applause can be heard from the empty seats in the audience. The lost script of "Netherworld" reappears, and all members of the theater troupe rehearsing this play disappear mysteriously.
The two teamed up to find out the truth. Shen Yan used the compass runes to break the curse on the stage, and Su Ling used opera to communicate with the spirit of the opera, but found that every strange incident was related to the theater troupe who died in a fire twenty years ago.
When the stage beams drooped with blood-stained costumes, the opera spirit sang through the night, Shen Yan clenched his mahogany sword, and Su Ling's sleeves fluttered: "Whether it's a human or a ghost, anyone who owes his life must go on stage to pay it back!"
