Based on Wendy Walker’s psychological suspense novel, What Remains follows Detective Elise Sutton, a devoted wife, loving mother, and cold case specialist. After taking the life of a disturbed man in the line of duty, Elise reels from intense guilt and self-doubt. Desperate to convince herself that she did the right thing, she makes contact with a mysterious man she saved that day. However, she quickly discovers he is not at all what he seems, drawing her into a dangerous, terrifying game of cat and mouse.