The story follows police officers Kata and Arnar, in charge of investigating gruesome murders from Iceland’s first serial killer. The unlikely pair slowly starts connecting the case to a mysterious and abandoned boys’ home named “Valhalla”.

When a young Icelandic lawyer finds herself accused of a murder she didn’t commit, she is sucked into the vortex of an international conspiracy. Her only chance of survival lies in uncovering the secret of an old German World War II airplane, recently discovered on Iceland’s largest glacier