The plotting of the story is how the narrator organizes the telling of a story. The story is what is told. Alternatively, we might be given lots of causes, but not shown their effects. The film maker provides the plot, the story is what viewers make of it. Screen time, story time, and plot time are generally not contiguous.
Most films employ a unidirectional chronological order which is quite rare in the novel.
Usually, classical hollywood cinema functions by presenting straight chronological order as natural and inevitable. Our expectations about narrative speed become most apparent when they are violated. Fleeing students are often responding to the pacing of the story. Many commercial films, after test marketing, have their pace altered - often by accelerating the rate at which they move directly into the action. One can generally be much more precise talking about the passage of time in film than in the novel.