After a shootout in which his partner dies, detective John Tallow accidentally finds an apartment filled to the brim with weapons. When forensic scientists take on the case, it turns out that every gun and machine gun is connected to an unsolved murder, and many of them are many years old. Now Tallow has hundreds of crimes on his hands, and he is faced with a real conspiracy in which many powerful people of New York are involved. , as well as with the hunter, the most terrible serial killer in US history, whose goals and motives are much worse than any struggle for power.