Troy's story is told. He makes a decision about his current life, and while that decision is a build up of other things, it is Joy's disappearance that is the final triggering factor. Some of those other factors are his relationships with Stan and to a lesser extent Monty who has been his surrogate father in light of what happened between him and Stan and Harry that led to the current animosity between father and son. The aftermath of that decision leads to Troy making a further decision regarding his thoughts about what truly happened to Joy. That further decision does not factor in his role in Savannah leaving when she did, getting her to leave which was not as easy as confronting her about knowing her story was all a fraud.
—Huggo