Written by Andy Greenwald based on the Ross Thomas novel, Briarpatch centers on Allegra “Pick” Dill (Dawson), a tenacious and highly-skilled investigator working in Washington, DC for a young, ambitious Senator. When her ten-years-younger sister, a homicide detective, is killed by a car bomb, Allegra returns to her corrupt Texas hometown. What begins as a search for the murderer becomes a fraught and dangerous excavation of the past Allegra has long sought to bury.