Mood: The mood of the video appears to be romantic and intense, with a sense of longing. The theme seems to revolve around love and relationships, possibly with a dramatic or thriller element, given the tagline 'A Lethal Love Story'. The overall emotion conveyed is one of passion and obsession.

Environment: The setting of the video seems to be urban, possibly in a modern Indian city. The background of the poster features a brick wall and a large poster with close-ups of people's faces, suggesting a cityscape or a crowded public area. The overall aesthetic is dark and moody, with a greenish tint to the images on the right side.