A young girl is murdered near Opole. Terrifying body mutilations and marks left in place indicate ritual murder. The matter is being dealt with by Commissioner Agnieszka Polkowska. Due to the extraordinary cruelty of the crime and the suspicion that the perpetrator may be a serial killer, the case is interested in the Provincial Headquarters. Polkowska, to her dissatisfaction, is assigned to the investigation of Commissioner Tomasz Mrówiec. At that time, Piotr Wolnicki, lectures on religious studies at the Opole university. He permanently works and lives with his family in a beautiful home. Already at the beginning of the academic year, the man chooses his humble and intelligent student Ewa Banach as his favorite. The girl does not know that her lecturer hides a dark secret.
After a miscarriage of justice that has led her behind bars, Constance Meyer has decided to take a new career path. At age 50, the farmer and mayor of her village became a student at the National School of the Judiciary.
Detective Charlie Hudson teams up with what he calls his "highly trained law enforcement animal" German Shepherd dog named Rex who he prefers to team up with because he doesn't talk his ear off.
Claire lost her husband Gabriel during the tsunami in 2004. His body was never found. 15 years later, Claire has a new life with Lukas and her son Zack. After a decade of mourning and professional purgatory, she has just landed a dream job in Abu Dhabi. One night, Claire is having dinner and sees Gabriel's reflection in a window.
Hoping to leave her past behind and start anew, Laila strikes a deal that prompts her to marry and live with Emad, a mentally-challenged man. However, their life together gets complicated when henious crimes take place at their living place each Friday.
Tae Pyeong is a prophet. When he looks into someone's eye, he can see the moment right before they die. Tae Pyeong is smart, rich and handsome. Despite his special ability, he is a bright person. A mysterious serial murder case draws Tae Pyeong's attention. He partners with Detective Joon Young to solve the string of murders.
The forensics team and the crime team on Hong Kong's police force are challenged once again as the squad is staffed with new personnel. This time, the crime-solving police force led by Go Sir, Dr. Man, and King Sir, who all work together with their respective teams to solve murder mysteries.
Oh Hyun-Jae used to be a top criminal profiler. He solved many cases with his skills, but an explosion, caused by a serial killer, ended the life of his fiancé. After the horrific incident, Oh Hyun-Jae vanished and he now lives in seclusion. Meanwhile, Cha Soo-Young is police officer in a rural area. She has a special ability, which allows her to remember everything that she saw. Due to her special ability, she is selected as a rookie detective who will partner with Oh Hyun-Jae informally.
At the age of 10, Shin Tamura’s happy family life was torn apart when his policeman father was sentenced to death and imprisoned for murder. Now, some 30 years later, Shin is determined to prove his father’s innocence by solving the mystery at the heart of the case. Finding himself transported back in time, Shin must uncover the shocking truth, change the past, and restore his family’s happiness.