The Old West's most famous lawmen are convening one final time, but not to solve a case. Instead, they're hoping to spend a few days together having a high old time in Denver before they ride off into the sunset of their years.
But then a prostitute is brutally murdered and one of their number stands accused of the crime.
As the violence spins out of control, the old boys, led by retired U.S. Marshals Tom Alvarez and Ben Comstock, are forced outside the law to do battle with powerful political forces and Colorado's most experienced lawmen to clear their friend's name - and save their own lives.