I predict that the story is about a bird. The theme of the poem is death.
My life is miserable, dreadful, and sad.
A man is sitting in his chamber and there is a tapping at his door. The man opens the door and a raven flies in and the man asks the bird questions and every time the bird says nevermore. In the end the man asks if he will ever see his lost love again and the bird responds nevermore.
Thy bird hath insulted me with thy'n word nevermore!!!
The man is grieving over his wife's death.
I will never see my poor Lenore again in the afterlife.
The poet's attitude toward the subject of the poem is miserable, dreadful , and sad. Some examples that illustrate the author's attitude is dreary, weary, bleak, terrors, lost, and nothing.
The shift in the story occurs when the man gets angry at the bird for saying nevermore.
The overall theme of the story is never grieve yourself to death or you might find out that things are worse off than you think.