What happened to Lara? Iceland, 1956. Fourteen-year-old Lara spends the summer on the small island of Videy, just off the coast of Reykjavik. In early August, the girl disappears without a trace. The mystery becomes Iceland's greatest unsolved case. What happened to the young girl? Is she still alive? Did she leave the island, or did something happen to her there? Thirty years later, journalist Valur Robertsson begins his own investigation into Lara's case. But as he draws closer to discovering the secret, it's soon clear that this is a mystery someone will stop at nothing to keep unsolved...