民国时期，北海市发生一起离奇凶杀案，受害者徐少青因为死因奇特，当地流传他是被邪灵所杀。警探龙聪和马六在调查过程中，将目标锁定为药剂师落霞飞。突然，第二名受害者出现，暂时洗清了落霞飞的嫌疑。同时，落霞飞的表妹记者花灵也在追踪报道此案。随着凶手第三次作案，龙聪查出凶手是三名受害者的同学裴静之，龙聪与花灵在追捕裴静之的过程中，陷入了他制造的离奇幻境，最终，马六出现救下二人，裴静之畏罪自杀。而在即将结案之时，真相再起疑云，幕后真凶恐怕另有其人……

In 1932, a series of strange murders occurred in the city of Beihai. During the investigation by police detective Long Cong, he found that the murderer used illusions to kill people disguised as ghosts and monsters. Finally, with the help of the female reporter Hua Ling, Long Cong brought the murderer to trial, but the truth hidden behind it was too much for him to accept...