Ace Harding regains consciousness in Las Vegas with no memory of how he arrived, only a pounding headache and an impossible deadline. Pressed into service by local mobster Tony Malone, Ace must track down $112,000 that belonged to a recently assassinated Chicago racketeer named Joey Siegel—or face the typical consequences that come with disappointing organized crime. With Malone's enforcer Stogie Martin shadowing his every move, Ace has seven days to locate the missing money and survive his involuntary employment in the desert city's criminal underworld.