One possible theme could be mystery. Since it involves a stranger and a long night, there might be some secrets or unexplained events that unfold during that time. It could also touch on themes of fear or the unknown, as a long night can often be associated with things that are hidden or not easily seen. Maybe the stranger is trying to find their way out of a difficult situation during this long night, which could also bring in themes of survival and self - discovery.
The theme might be related to change. The long night could symbolize a difficult or transitional period in the stranger's life. As the night progresses, the stranger may go through various experiences that transform them in some way. Another aspect could be about the human condition. The stranger in the long night might represent the everyman, facing the challenges and uncertainties that we all experience at times. This could lead to themes of hope, despair, or the search for meaning in a difficult situation.
It could be about loneliness. The stranger in the long night might be experiencing a sense of isolation.