In television and film, a plot point is any incident, episode, or event that "hooks" into the action and spins it around into another direction.
He proposes that a well-structured movie has two main plot points within a three-act structure.
[2][3] The first major plot point occurs 20–30 minutes into the film (assuming a standard 120-minute running time), and the second major one occurs 80–90 minutes into the film.
It is the choice of the screenwriter, but it is always an incident, episode, or event dictated by the needs of the story.
The purpose of a plot point is to move the story forward, toward the resolution.