Between endless bills, midlife marriage squabbles, a new pregnancy and mounting work pressures, Ava and her husband Nathan feel like they're watching their lives fall apart. Ava's passion is true crime, so when she realizes that plumber-turned-family friend Matt is the serial killer behind a string of unsolved murders in LA, she spots an opportunity. Ava and Nathan blackmail Matt into co-creating a podcast about his "work," but they quickly realize that collaborating with a killer won't be a cakewalk.