82-year-old retired mailman Brian Franks spends his days chasing memories and half-finished inventions. When he witnesses what he believes is a murder during one of the dementia-driven walks of his old mail route, no one, including his own family, believes him. As his confusion deepens, Brian uncovers clues connecting his late friend’s death to two local criminals, all while trying to prove he’s not losing his mind, and that he really did make millions from a forgotten stock purchase.