The assignment was commissioned by a Mr. Wang, who said his wife had disappeared on the subway in the early hours of the night. That day, he and his wife went home by subway after watching the evening movie. At that time, he slept on the subway and woke up to find his wife missing.

He searched for his wife for a few days, but he could not find her anyway. Later, he was told by his wife that he had been killed on the subway, so Mr. Wang must not go to the subway to find her. Mr. Wang was worried, so he entrusted Bagua Tang to help solve...