Based on the best-selling book by Colleen Hoover, Verity stars in Verity as an injured, best-selling writer whose husband, Jeremy (Josh Hartnett), hires a struggling writer, Lowen Ashleigh (Dakota Johnson) to help finish his wife’s book. But the more Lowen learns about Verity, the scarier the situation becomes. Don’t worry, this isn’t some blood-soaked slasher. Director Michael Showalter describes it to Polygon as more of a “twisted, dirty thriller.”