Mood: The mood of this video appears to be action-packed and thrilling, with a sense of urgency and intensity. The theme seems to revolve around detective work, mystery, and suspense, likely unfolding in a dynamic and fast-paced narrative.

Environment: The setting appears to be an urban landscape, possibly Kolkata, given the reference to Saradindu Bandyopadhyay, a renowned Bengali writer known for his detective stories. The presence of a bridge and the attire of the protagonist suggest a colonial or vintage-era backdrop, blending historical elements with a crime-ridden plot.