Sweden, 1855. "Worst thing I ever saw..." The Minister of Justice has received a disturbing message. There's been a massacre on one of Lapland's mountains: a priest, a law enforcement officer, and a local settler have been slaughtered by one of the indigenous Sami people. The murderer is in custody, but he refuses to talk. The Minister dispatches his son-in-law, a geologist, to investigate, as there is another reason to visit Blackasen: it is a mountain with many secrets, a mountain whose rich mineral deposits have never been exploited. But Magnus does not journey alone. The Minister's daughter, in disgrace, is sent with him. The two unlikely companions venture out of the sweltering city to the wild landscape of Sweden's far north under the strange, insomnia-inducing light of the midnight sun. There, the shocking truth they discover about the murders and what lies behind them will only be matched by what they discover about themselves. For Lovisa and Magnus--and for the people of Blackasen--nothing will ever be the same again.