In the autumn of 2011, the wind blew slowly and the shadows of banana trees swayed in Haiya City, which is near the sea.Lu Zhu, a criminal police officer transferred from Beijing, met Tong Yan, a forensic doctor from the same branch, during a dispute over injury assessment. Afterwards, the two changed their views on each other during their collision and cooperation, and gradually became aware of each other's hidden pain.

At this moment, a bizarre rape and murder case forced Tong Yan to look directly at the nightmare that had haunted him for many years: the serial killer who killed his twin sister reappeared 24 years later, and was still following him!

Lu Zhu and Tong Yan followed the clues left by the stalker and were about to catch the murderer. The appearance of another woman, Shen Shaojie, shocked everyone because she was Tong Yan's wife who had been dead for 24 years.In this way, the twin sister Shen Shaojie entered Tong Yan's life and turned her life upside down.

Lu Zhuhu was always wary of Shen Shaojie out of his protection of Tong Yan, suspecting that her appearance was not accidental.As a writer, Shen Shaojie felt that perhaps Lu Zhu could understand him better than Tong Yan, and thus developed a stronger interest in him.The three of them were like the sea under the moon, with undercurrents surging under the calm waves, and the moonlight was sometimes bright and sometimes pale.

Thanks to Lu Zhu's Tong Yan's disdainful efforts, the serial murderer from 24 years ago was finally caught, but he claimed that the two recent murders were not his own fault.The police quickly identified another suspect, but what they didn't know was that this person was just an accomplice, and the real person who planned everything turned out to be the original victim Shen Shaojie. Faced with the cruel truth, Lu Zhu and Tong YanYou will also make your final choice.