When the fog veils cobbled streets, it is the most opportune of times for crooked intentions to materialize. But they shall not escape the quick wit of the world’s preeminent detective.

He arrives promptly at your door with a pipe lazily hanging from his lips and a notebook at his hips. Out comes the loupe, the notebook, the dirty footprint on the dark carpet, the fired bullet in the wall. What does it all mean?

Our ingenious detective goes right to work solving this 5×3 puzzle while the tick-tock of his pocket watch is more than a mere time-teller.