A serial killer, calling himself The Gaf, starts an interstate killing spree that quickly propels him to the top of the FBI's most wanted list. Special Agent David Drake and his hand-picked team of agents drop everything and form a taskforce with one purpose-to track down this psychopath and bring him to justice. Crisscrossing the country from one crime scene to the next, Drake and his team can only hope the killer gets careless and makes a mistake. But this killer is no novice. His father, serial killer The Zodiac from the late 1960s and early '70s, has taught him well and the taskforce has its hands full. How many more innocent victims must die before Drake and his team can track down this monster and stop the carnage?