The small community of Akranes is devastated after a young man dies in a mysterious house fire. When Detective Elma and her colleagues from West Iceland CID discover the fire was arson, they become embroiled in an increasingly perplexing case. For the dead man's final online search raises fears that they could be investigating not one murder, but two. A few months before the fire, a young Dutch woman takes a job as an au pair in Iceland, desperate to make a new life for herself after the death of her father. But the seemingly perfect family who employs her turns out to have problems of its own, and she soon discovers she is running out of people to turn to. As the police begin to home in on the truth, Elma finds herself in mortal danger -- someone has secrets they'll do anything to hide.