The calm of snowy New York is disrupted by the loud news: the famous musician was found dead. It turns out that a peculiar message in the form of a heart with the initials "D" and "E" is left on the body of the deceased. Who, and most importantly - why committed a brutal murder? Lieutenant Eva Dallas understands that two are operating in the city - a man and a woman, who already have such terrible crimes on their account. The city's top cop and her team only have a few days to save another victim and stop the villains before their creepy game goes too far.