Welcome to Seascape house.A beautiful family home by the coast. Where someone is hiding a terrible secret.Lyra Pullman has been waiting for this day. Her fourth birthday party. But when her guests come knocking, she is nowhere to be found.Little Lyra lies dead in the Wendy house at the bottom of the garden. Suffocated.Her grandad couldn't save her because he's been murdered too. In a mess of blood and rainbow cake.Lyra's distraught parents turn to Detective Siv Drummond for answers. They point to a long list of suspects, from Lyra's dangerously dysfunctional aunt to the stranger her grandad was meeting in secret.But Siv is not convinced. Are Lyra's parents telling her the whole truth?Maybe life by the sea was as blissful as they want her to believe.But what if they're lying?