What is the plot of the poem?
Would be the answer.
If you compare and contrast the definition of story and poem. And look up the definition of plot.
Plots are meant for stories and books.
However poems, are a piece "of writing that partakes of the nature of both speech and song"
Poems focus on rhythmical, metaphorical, and other literature elements.
Therefore, you would not ask for the Plot of a Poem.
(Plus a plot, has to build up to a climax, and a bunch of things which are use to Google)
If you need any more help, just comment or message me. :)