Which line tells the reader that there is a complication? my eyes can't get enough of the trees— a sunny road runs through the mulberries, i stand in the advancing light, i'm at the window of the prison infirmary

I'm at the window of the prison infirmary.

The first few lines in the excerpt have a cheerful tone. The speaker tells us that he is looking at the trees, and that the road is sunny and leads to the mulberries. However, the speaker then introduces a complication. He is in prison. Moreover, he is in the infirmary, and the only way he can appreciate the beauty of the outside world is through a window.