Michael Dennis Ryan is a pretty good guy--for a professional hit man. His targets aren't pillars of society, and he's not there to judge. He's there to kill: in 13 minutes or less. Crime pays, when you're as deadly efficient as Ryan; but lately he feels himself slipping, spending more time at the bar than with his wife. Vowing to get out of this racket while he's still alive, Ryan accepts one last job, a big score before a clean slate. The payday won't come easy. An anonymous client has hired Ryan and his partner to knock off a student at Harvard, who happens to be the son of a Serbian mob kingpin. With Ivy League ambition, Ryan and his partner have plotted their approach, the hit, and the getaway.

They're professionals with a plan-until that plan goes up in flames: a shootout in Harvard Yard ends with carnage, collateral damage and unwanted attention. A hit is a hit, and the payout is theirs. But something feels off to Ryan: Who ordered the hit? Unholy alliances come to light and the body count rises-putting Ryan in the crosshairs, along with everything he holds dear. Forced to draw on the skill set he hoped to leave behind, Ryan's only recourse is to turn the tables for his last and loneliest mission: revenge. And every minute counts.