I think it might be your sort of thing. I haven't been yet. Winston's visit is the classic call to quest. She needs to catch a killer and has run out of leads to follow. She needs the hero's help.
Time is of the essence, of course.
Law enforcement agencies operate on a philosophy of triage. If the killer can't be caught soon, they must move on to other also-urgent cases. McCaleb has conflicting emotions at returning to the murder game. He felt a thrill at the possibility of having a part of his old life again. He also felt guilt over the idea of bringing death into a home so full of new life and happiness.