Paralyzed by a debilitating illness, 90-year-old Rachel Matson finds herself confronted by a disturbing mystery -- one that begins when a 19th-century pistol that belonged to her husband pops up on Antiques Roadshow. Determined to solved it, she begins the arduous task of teasing the past from the shadows, uncovering a tale bearing a sordid secret -- and an even more devastating truth.