Heartless follows Sofie and Sebastian - two siblings with a deep dark and fatal secret. In order to survive they must suck energy out of other people. We follow their quest for answers as to why they are this way and their search leads them to Ottmannsgaard, a boarding school with plenty of deep dark secrets of its own.
Qi Sizhe, a young forensic expert, is determined to investigate the suspicious car accident that killed his girlfriend, Yu Fei. He joins the Hecheng Police Department and is thrust into a series of eerie cases. Alongside colleagues Zhu Qingyue and Han Feng, Qi Sizhe unravels the truth behind the mysteries, uncovering a dangerous conspiracy.
After his girlfriend's murder in Seoul, Tang Shuo joins detective Shin Jun-hyun to solve a series of locked-room murders. Though they catch a suspect, he suspects a larger scheme. With help from a journalist and a student, he stays in Seoul, using sharp deduction to uncover the true mastermind.
A story with fantasy elements revolves around the god of death, the ghost keeper and the judge. In helping save others from death, three ghost keepers learn the value of living.
Xiao Yi, Wu Xin, and Yin Zheng Feng are three people whose names were mistakenly put into the book of death. As a result, they are invited to become ghost keepers and tasked with helping the god of death. Once they restore the system and save everyone who has been erroneously sentenced to die, they can then be reborn.
Sergeant John Mackenzie is flying to Russia from the United States under the professional exchange program. The American not only becomes the partner of investigator Vasilisa Vikhreva, but also temporarily settles in her apartment. It's hard for John and Vasilisa to work together — the difference in characters and mentalities affects. But the successful results of joint investigations convince the leadership to create a special department around them to combat crimes committed by foreigners and against foreigners in Russia. Unraveling one case after another, the partners find themselves embroiled in an international espionage game around a major scientific discovery.