An ancient crown with magical powers. Who will get it? Standing on the bow of his ship, Thorgrim Nightwolf looked out for prey. And then the Viking noticed a sail in the distance. A short fight - and the fishing boat finds itself at the mercy of the Norwegians. It is almost empty, the only valuable thing found is a precious crown. Brave Thorgrim did not know that a sacred Irish relic had fallen into his hands - the Crown of the Three Kingdoms, which gave power over Ireland. Powerful rulers of different countries are hunting for her... Battles and captivity, the love of an Irish princess and the revenge of her father... Thorgrim does not even suspect what incredible adventures await him.