Having hit a child, but acquitted of manslaughter, Colin River goes on a sea cruise to unwind and calm the voice of his conscience. But a few days later his body is found on the side of a road in Scotland, and Miles Breedon, an insurance company investigator, must determine the exact time of death. However, in two days the body managed to disappear and then reappear, and now the issue of insurance payment depends on whether Miles unravels the mystery of River’s death. It seems that such an alliance is doomed to failure from the very beginning. Vernon Letheby, the peer's son, is a strikingly handsome man with extravagant tastes, whose name is on the front pages of the tabloids and whose father gives just enough pocket money to pay off his racing debts. And Joe Henderson is a gruff and reserved middle-aged Canadian, a former smuggler whose credits include suspicion of train robbery and an extraordinary ability to dig. This odd couple goes in search of the famous treasure of Prince Charlie in Northern Scotland. According to legend, the treasure is securely hidden on the island of Erran, and if Lethebi is to be believed, the encrypted map that he remembers from his childhood years spent in the Castle of Dreams will lead them straight to the hiding place. All that remains is to come to an agreement with the new owner of the island and castle, Sir Charles Airdrie, and the search can begin.