Direct answer
Objectives follow journal display order. Some depend on your choices; follow the active objective in the game.
Result
I have oft heard Geralt boast that in terms of monsters, he firmly believes he has seen it all. Yet what he encountered on this occasion demanded that he revise that view. While travelling through Toussaint, he happened on a female hermit who claimed she an invisible specter was tormenting her and would be her end. The witcher was skeptical, not least because he could not imagine how he might defeat something invisible. The woman's suffering seemed so intense, however, that he resolved to try to help her.
