Treasures under the village of Shteigary (The Witcher 3: Wild Hunt)

walking around the suburbs of Novigrad, I met peasants whom the guard was digging into, well, I sorted out the situation) and the peasant said that a great warrior seemed to be buried under the village of Shteigary and there were a lot of treasures and said "you may be lucky to find them", but that's the problem : the quest does not appear, nothing is marked, ran around the village and did not find anything. Mb someone came across, did you find it?