In Miss Cat's quiet neighborhood, something isn't right: her friend Ole has closed his ice cream shop without explanation and has disappeared overnight. Intrigued by the case, Miss Cat begins an investigation that will lead her, along with her friend Griselda, to the Old Drakkar museum, a place dedicated to the Viking world and full of secrets. Among puzzling clues, suspicious characters, and a mysterious sunken ship, the feline detective must use all her intelligence and perceptiveness to unravel an unexpected conspiracy. In The Secret of the Viking King, Miss Cat finds herself immersed in a case of underwater archaeology: a new and thrilling adventure that combines mystery and humor with an agile and visually impactful narrative.