In the coronary care unit of one of Denmark's leading medical centers, a nurse fills a syringe and enters the room of an elderly patient... Six days earlier, a newspaper delivery man in the heart of Copenhagen stumbles upon a gruesome discovery: the naked body of a dead woman lying in a fountain. The victim's arms and thighs are covered in bizarre, symmetrical cuts. The cause of death appears to have been exsanguination. While investigator Jeppe Kerner unsuccessfully combs the streets of Copenhagen in search of the killer, his partner Anette Werner, who is on maternity leave, decides to start her own independent investigation. But she still has no idea what monstrous dangers she will have to expose her life to find the criminal. The investigation will lead the police to the very heart of the healthcare system, the shocking secret of which will make their blood run cold. Meanwhile, the countdown to the next kill starts. Who will be the new victim?..