An arc is the trajectory of change in a narrative — the shape traced by a character’s development or a plot’s progression from beginning to end. If plot is what happens, arc is the direction it’s heading and the change it produces.
A character arc traces how a character changes through the events of the story. The change might be growth (a coward becomes brave), decline (an idealist becomes cynical), or revelation (a character discovers something about themselves that was always true). What matters is that the character at the end is different from the character at the beginning, and the difference is earned by what happened between.
Not every character needs an arc. Flat characters — in E. M. Forster’s sense — serve functions other than change: they embody a principle, provide contrast, or anchor the world. But the protagonist of a narrative typically undergoes some transformation, and the reader’s sense of the story’s meaning depends on what that transformation is and what caused it.
A narrative arc (or story arc) describes the shape of the plot: the rise in tension through complications, the peak at the climax, and the descent through resolution. Gustav Freytag’s pyramid (exposition, rising action, climax, falling action, denouement) is the classical model, though many narratives — especially contemporary ones — modify or reject this shape.
Arc is a retrospective quality. The reader perceives it after the fact, looking back over the whole narrative and recognizing the shape. The writer creates it by ensuring that events build on each other — that each scene moves the character or situation in a direction, even when that direction isn’t apparent in the moment.
Related terms
- character — the entity that undergoes change through the arc
- conflict — the engine that drives the arc: characters change because obstacles force them to
- plot — the sequence of events that traces the arc
- tension — rises and falls along the arc
- theme — the arc’s direction reveals the story’s thematic meaning