Secret Investigation Record is based on cases detailed in the Annals of Joseon History with a bizarre twist; these incidents incorporate mysterious, supernatural elements that cannot be explained through science. Kim Hyung Do is an inspector of the state whose single-minded focus on his investigations into administrative misdeeds bring him into direct contact with these strange mysteries. Heo Yoon Yi is a government employee who aids him and attempts to understand these scientific impossibilities with an open mind, in contrast to his cynicism.
An employee of the Russian special services goes undercover to Mariupol to identify the curator of the CIA's agent network, who, using recruited youth, is preparing a large-scale terrorist attack in Russia.
Single mother Yi-an raises her fraternal twin daughters, Cassy and Lily, alone. Cassy is sweet and likable, driving Yi-an’s successful influencer career. Lily, with a cleft lip, is shy and often overlooked. As Yi-an’s popularity dwindles, she orchestrates a “Cassy is missing” plot to regain attention, much to Lily’s dismay. The relationship between the mother and daughter faces its greatest challenge yet.
Tannie Maria sees food as "medicine for the body and heart". She envies romance as much as she enjoys cooking and eating. But it's death that shakes up Tannie Maria's life, when one of the correspondents to her column is brutally murdered.
Sam is a hard-headed manager at a family-run business in the North West. However, when Sam arrives at work one day to find a dead body in the office reception she is forced to reckon with not only murky behaviour in the present, but murderous secrets from the past as well.
Ji Sub is coming back home after unsuccesfull audition. Sudden sound makes him stop his car. When he's looking into his trunk he discovers young woman, Yeon Hee, who doesn't remember anything about herself. Who is that girl and why did she appeared in front of Ji Sub?
The series tells the story of a criminal investigation into the murder of businessman Paulo Gomes de Aguiar at the beginning of August. In the midst of the Vargas government crisis, the murder case is taken by police commissioner Alberto Mattos, an honest and incorruptible man who is not well regarded by his co-workers, as the place is totally turned over to corruption.
Hyuk-joon, a debt-ridden young man, joins the mysterious Spyder Human Resource Center lured by unusually high wages, only to encounter bizarre phenomena. As strange events unfold, accident investigator Yeon-joo begins digging into the company's secrets, while Hyuk-joon's sister Ji-yoon grows increasingly concerned for him.
A mother's journey in search for her son's murderer. The story unfolds between the past, present and even nightmares which gives subtle clues and hints to guide the mother to the murderer.
When 10 year old girl is kidnapped from the natural history museum, the police questions eight key witnesses to uncover the truth and find the child before it's too late.