Meet Sherlock, the bravest dog on watch, keeping the streets of London safe, day and night. When firefighter Paul was offered the chance to work with a young, energetic, Cocker Spaniel as part of the Fire Investigation Dog unit, he knew that D-Day i- that's D for Dog Day - was going to be something special. Enter Sherlock, a furry ball of power-packed chaos. But this dog is like no other. He is the pride of the Fire Brigade. One of the most talented and extraordinary dogs the fire brigade has ever trained. Paul instantly knew they would be a force to be reckoned with. Forming an unbreakable bond, Paul and Sherlock have investigated hundreds of the most dangerous fire scenes, and with Sherlock's nose for identifying causes of fire, have kept London safe. This the incredible true story of London Fire Brigade's top dog on the watch.