Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
Near the Nilfgaardian camp Geralt ran into a noblewoman from far-off Nazair. She had journeyed to the front in search of her son, a soldier. The woman was worried because her son would write her often, but at some point had suddenly stopped. No one in the camp knew what had happened to him, but the woman did not believe they were truly ignorant. She offered Geralt a reward for discovering the truth.
