It does not always start out that way, but the journey toward the goal can be one from safety to danger, from the known to the unknown. The obstacle is the challenge. It’s what gets in the way of achieving the protagonist’s goals. It is a problem, dilemma or question. It may be another person, something physical to be overcome, or something to be learned. Often it is an internal challenge. This conflict makes the story worth telling, gives it drama or makes the comedy work.