The plot is the story line...what happens.
The setting is where and when it all happens.
Here is a idea of a plot outline
I . The beginning
A. Introduce the characters
B. Conflict/problem (the "collision idea") --
The conflict or problem is what "drives" the plot.
C. Setting - where and when the story happens.
Character tries to solve the problem.
The character has difficulties solving the problem
Climax - character tries to solve the problem again The character can either succeed ( happy ending) or fail (either type of ending will do).
Resolution. This is what happens to show there reader that no other result is possible. The "they all lived happily ever after" or "they would never be the same again".
Remember that only narrative poems will have a plot.