Kristin and Steve are living a quiet life in Iceland until an emergency call and a mysterious murder lead them on the trail of diamonds hidden during World War II. Intrigued by the mystery of the Wolf's Tears diamonds, they are joined by their fearless friend, sheep farmer Einar.. In pursuit of the treasure, the trio ends up in Finland via Germany, followed by hired killer Thomas, whose true motives are shrouded in mystery. In the archipelago of Turku, they come face to face with the ruthless industrialist Maxine, who is prepared to do anything to get her hands on the diamonds.