Crime never sleeps! When Detective Montalbano finds himself in between cases, a mastermind of deception takes the opportunity to play a game of clues and trickery with the unconventional inspector. Then, a visit to a luxury yacht sees Montalbano tasked with solving a murder on the high seas, where the suspects are limitless. This volume collects Episodes 21-22 of the non-stop crime series: "The Treasure Hunt" and "The Age of Doubt."