Nightfall meant that after the sun set, the sky gradually darkened, indicating the arrival of night. This word could be used to describe dusk or to describe the scene of night in stories. It could also be used as a metaphor for the gradual arrival of a certain atmosphere or emotion.
As night fell, the city began to become quiet. Only the faint light of the lights flickered in the darkness. The leaves swayed gently in the breeze as if they were singing for this beautiful night. Everything became quiet and peaceful. Only the unique sense of tranquility in the depths of his heart remained.
As night fell, the lights in the city gradually went out, leaving only darkness. The sky gradually turned gloomy and the rain fell, wetting the ground. On this quiet night, people began to return home. The streets were empty except for some people who were in a hurry. Everything became quiet and peaceful. Only the sound of the breeze blowing the leaves made people feel a trace of peace.
Rain falls, the city falls, and the night is slightly cool. It means that although the rain in summer is very heavy, it does not bring coldness. This sentence described the high temperature in summer. Even if it rained, it would not lower the temperature. It could also be compared to the feeling of helplessness and desolation when one gave everything they had but received nothing in return. In short, this sentence expressed the hot summer climate and people's feelings.
I'm not sure specifically as I haven't read the novel. But typically, in a novel with a title like this, there might be a protagonist who is perhaps a detective or an ordinary person drawn into extraordinary events that occur as night falls.
The main theme could be mystery. As night often symbolizes the unknown in literature, the novel might revolve around uncovering secrets that are hidden during the day and come to light as night falls.
The theme of 'When the Night Falls' might be centered around self-discovery and facing inner fears. The night could symbolize the hidden aspects of the characters' personalities that come to light.