Frank Tower is back to investigate a serial killer full of rage, envy, and cold-blooded cruelty in this thrilling fourth installment of the Frank Tower Mystery Series.

The first body is discovered at the city park, arranged in an unnatural position, eyes wide open.

Inside the body, police find a thumb drive with a countdown clock until the next victim is killed-and a demand to inform PI Frank Tower about the murder.

The victim's best friend hires Tower to investigate, but with limited clues and stubborn resistance from the police, he's in for his toughest case yet. Soon, several other victims are discovered in public areas across the city, each body containing a similar thumb drive. Each time, the countdown clock shows less time to stop the next murder.

And then a chilling discovery forces Frank to make an impossible choice.

When the clock runs out, will he beat the killer at his own game.or lose the ones he loves the most?