It's 1952 and John Truesdale is found murdered on his own farm. Six amateur sleuths are on the case. Calling themselves the Rounders, they're friends who meet for coffee every Thursday morning at a roadside cafe on the Lincoln Highway. They're together when the radio announces the untimely death of Truesdale.
With strikingly different backgrounds and personalities, the Rounders have one thing in common: a nose for crime. They discover Truesdale had a lot of folks who wanted him dead. Rumor has it he impregnated a local girl and left her to fend for herself. Then, there's the uncle who claims Truesdale stole the family inheritance.
When a second man is found shot, no one can identify him.
The deeper the Rounders delve into the two murders, the more perilous their investigation becomes. The sluggishness of the sheriff doesn't help. And the problem is compounded by a seemingly unrelated theft of Indian artifacts and an antique store break-in. The lives of the Rounders are threatened as the unravel the clues.