A mysterious traveler blackmails a young TSA agent into letting a dangerous package slip through security and onto a Christmas Eve flight.

No one is more shocked than Hannah Swensen (Sweeney) when her mother, Delores (Niven), finds the dead body of the homeowner-a frequent patron of The Cookie Jar-while looking for a home for her sister Michelle (Atkins).

When oil is discovered in 1920s Oklahoma under Osage Nation land, the Osage people are murdered one by one - until the FBI steps in to unravel the mystery.

It follows Monk, a brilliant detective with obsessive-compulsive disorder. He returns to solve one last case involving his stepdaughter Molly, a journalist preparing for her wedding.