In 1844, a murder in Husum and the legend about the sunken town of Rungholt lead lawyer Theodor Storm and his secretary Peter Söt to the island of Föhr, where the Danish King is spending the summer. The author Hans Christian Andersen is in his entourage. What is the significance of the mishaps in which Andersen becomes involved? Are there court intrigues against him? Does he know anything about the lost treasure map of Rungholt? During his investigations, Storm confronts powerful adversaries – and almost overlooks the greatest danger - the North Sea itself.