Aren't these the same thing? I believed this before discovering that plot and story is actually very different, even though many people use them in the same terms. The story or narrative is what we see on screen and what is shown to the audience. The plot includes what we don't see, the characters lives outside of the film.
Conventional narratives follow the same basic pattern in terms of the way they construct a story. Tzvetan Todorov defined the 3 main parts of a narrative structure (the beginning, middle and end) as:
Equilibrium - the balance of normality
Disequilibrium - the problem and climax
New Equilibrium - return to normality, world at a balanced state.
This basic three point narrative can be looked at in more detail. This is sometimes called the narrative arc. For instance there may be more than one disequilibrium, or more than one equilibrium. Too many of these though can leave a movie boring as the same story line might be used. E.g. The good guys always defeate the bad guys, so therefore the movie becomes predictable. Some narratives end in disequilibrium to discomfort the viewer. For instance, although not a movie, one Sherlock series ended with Sherlock presumably dead, leaving the views distraught.
Classical Hollywood narrative usually follows a similar pattern to the previous. This is a little like an equation for Hollywood script writers to follow and there for ending up with an interesting story line. The structure is:
Situation - Understanding quickly who the characters are and where we are. This is ALWAYS at the beginning of the movie. If not, this leaves the viewers confused. This can also take too much time up within the movie, leaving the viewers bored, so the balance of timing is essential.
Complication - Events which occour to make a problem. This could be part of the plot, something going on before the story was being filmed.
Climax - This is the moment where the problems are being solved. In action films, convetionally the problem is solved from a battle scene which should take a reasonable amount of time to solve but not too long to solve so the audience doesn't get bored.
Resolution - Returns to some point of normality (equilibrium).
Markers
A marker is a media language choice which provides information to audiences quickly and economically = Economy of Presentation.
Location Georgraphical marker shows where abouts in the world this film is taking place.
Historical Marker - The time or era the text is set in. This allows the audience to understand what rules and laws may have been aroudn then and will help the audience understand why actors act a certain way.
Generic Marker - The genre of the text. This could be action or comedy and is usually established within the first 5 minutes of the film.
Character Marker - Information about the characters. This will be given throughout the film, but alot before the end so the audience can either sympathise or understand the character.