We rejoin our favourite blue-haired heroine Hilda to find her caught up in a crisis in Trolberg. Ships are vanishing from the harbour and no one knows why. Could the answer lie out on Cauldron Island? Meanwhile, David suspects wild weather predictor Victoria Van Gale is up to no good as she moves into the old windmill. There is no shortage of unexpected twists, turns and new friends in this latest instalment of the Hilda fiction series.