It was no surprise that Officer Sean Cassidy had one of the busiest beats in his precinct; his refusal to take bribes or stand idly by as his fellow officers became more and more corrupt earned him more than his share of enemies within and without the NYPD.

He hummed to himself tunelessly as he weaved through the pedestrian traffic, listening to how the soundwaves traveled through the space around him. It was almost impossible to sneak up on Cassidy.