Caleb is not content with the Christian life. He feels it's drab and boring and there has to be more to life. So he leaves home to go on a journey of self-indulgence, "denying himself no pleasure" as Solomon once did.
He quickly learns that there is no such thing as a free ride and indulgence is just an illusion that blinds us from the truth. The road most travelled leads to a very unpleasant place, and the end result to sin is always death. But his choice to return home is just the beginning of his troubles and his DETOUR may have cost him more than he bargained for.