Boston cop Pally is forced into early retirement, putting a strain on his marriage. Pally's stepbrother, Ray, attempts to lift his spirits by tipping him off to a sure-bet racehorse. But their attempts to secure the champion equine are thwarted by a local mob boss, who steals the horse as repayment for a gambling debt. With their investment on the line, Pally and Ray become entangled in a web of underworld crime and murder.
After hiding his loot and getting thrown in jail, brooding outlaw Ruby befriends Quentin, a dim-witted and garrulous giant. After Quentin botches a solo escape attempt, they make a break together. Unable to shake the clumsy Quentin, Ruby is forced to take him along as he pursues his former partners in crime to avenge the death of the woman he loved and get to the money.