At the beginning of the 14th century, the French king Philip IV the Fair liquidated the Templar Order, confiscated its wealth and achieved the abolition of the order by the Pope. From now on, the Templars became exiles. They could find refuge only in the land of the Rus, where the papal bull had no force. Along the way, at the mouth of Lake Ladoga, on Orekhovoy Island, they buried their treasures. In the 16th century, the Spanish King Philip II, who became the most powerful ruler in Europe, waged a merciless struggle against opponents of the Catholic religion. Having learned from the Grand Inquisitor that the Templars took the main treasures to the Principality of Moscow, he embarks on an adventure in search of money for the war. A mission is sent to search, which, under the guise of a merchant, includes a hardened adventurer and pirate... And an ancient map with a plan of Walnut Island and mysterious marks on it, centuries later, falls into the hands of the archaeologist Tikhomirov!