Charlize Theron stars as Libby Day, a grown woman who ended up with a small nest egg to live on due to donations stemming from public sentiment following the slaughter of her mother and two sisters at a young age, as well as from royalties for a memoir account of her experiences chronicles in a book she didn't write, much less read. Her brother, Ben, was pegged with the crime and charged to the fullest extent of the law, as he still sits nearly three decades later in a prison cell. Two months behind in rent and with hardly two nickels to scratch together, Libby reluctantly accepts an offer from a strange young entrepreneur named Lyle to help him and the members of his clubhouse of true crime enthusiasts and conspiracy theorists to get to the bottom of who really murdered her family.