Means you can have smaller stories nestling inside a bigger story. In Nicholas Cage National Treasure for instance, the big story is the treasure hunt, and the subplot is his romance with the female lead character.
Perhaps you mean to ask about a subplot? A subplot is a less important second plot in a literary work or film. Perhaps it is a story that has been written by a character of the story, although this is unlikely.
main character
Anything by Charles Dickens.
A minor story that runs inside the main story is called a sub-plot.
Mainplot
Perhaps you mean to ask about a subplot? A subplot is a less important second plot in a literary work or film. Perhaps it is a story that has been written by a character of the story, although this is unlikely.
it is called a "subplot"
subplot
main character
A novel differs from a short story because it is more likely to include a subplot.
Anything by Charles Dickens.
A subplot is a part of the narrative that is separate from the main plot of the story. It is a side story that usually related to the main plot but are not as important to the work.
The main plot is the effort by the Big Bad Wolf to convince the pigs to let him eat them, or failing that, to demolish their shelters with his powerful puffing. The subplot is the moral basis of the story: the poor decisions and lack of diligence by the slothful first two pigs.
A subplot in "The Westing Game" involves the mystery surrounding the relationship between Turtle Wexler and Angela Wexler, their complex family dynamics, and their individual struggles and growth throughout the story. This subplot adds depth to the main mystery of Samuel W. Westing's death and the inheritance competition.
there are 4 subplots: Subplot #1: Charlie's relationship with Algernon Subplot #2: Charlie's relationship with Mrs.Kinnian/Alice Subplot #3: Charlie's relationship with coworkers Subplot #4: Charlie's relationship with his doctors
A minor story that runs inside the main story is called a sub-plot.
That's sort of vague, but I believe a subplot or side story could fit under that description.