1767, February. Near the coast of Spain, having engaged in a battle with pirates, the sailboat "Dei Gloria", belonging to the Jesuit Order, perishes. The only person who escaped, the cabin boy, not having had time to give full testimony about what happened, mysteriously disappears. All he managed to report before his disappearance were the coordinates of the place of the tragedy… Spain, our time. Navigator Manuel Coy, temporarily deprived of the right to engage in shipboard activities for having run the ship aground during the watch, gets acquainted at an auction with a girl who bought an old nautical chart for a lot of money. Tangier Soto, an employee of the museum in Madrid, is maniacally obsessed with the idea of finding the lost ship, which, as she believes, was carrying a cargo of extreme importance. Which she takes as an assistant as an experienced navigation specialist. The girl knows perfectly well that she has crossed the path of powerful and dangerous forces capable of doing anything to eliminate a rival. But that doesn't stop her… In the best traditions of the "Dumas Club" and the "Flemish Board"!