The Inmate by Freida McFadden is a gripping psychological thriller about a woman named Grace who, after serving time in prison, is released and returns to her small town. However, her past haunts her as she uncovers dark secrets about her former life and the people she once knew. As tensions rise, she must confront the truth and navigate a dangerous web of lies and deceit. The novel is filled with suspense, twists, and mystery.