“I was 8 the night they were killed,” Charlize Theron recalls as character Libby Day in the new trailer for the movie adaptation of author Gillian Flynn’s best selling book, Dark Places. “The little orphan girl of the Kansas prairie massacre.”

Film distributor A24 released the movie’s domestic trailer Thursday, which features a dressed-down Theron (no canary yellow dress a la Cannes here!) as she meets with a group of undercover investigators—darkly called “The Kill Club”—in order to find out who killed her two sisters and mother when she was just a child. Was it her brother, played by House of Cards alum Corey Stoll? Or was a Satanic cult guilty of committing the gruesome crime? Directed by Gilles Paquet Brenner, the film features a star-studded cast including Nicholas Hoult (X-Men: Apocalypse), a chain-smoking Chloë Grace Moretz (If I Stay), Drea de Matteo (The Sopranos) and Christina Hendricks, appearing on-screen for the first time since Mad Men.

The movie is based on a book of the same name by Flynn (of Gone Girl fame), which became an instant hit when it was published in 2009. The novel quickly became a New York Times best seller, while also earning critical praise for its gritty depiction of small-town America.

Dark Places opens nationwide on Aug. 7.

Dark Places
  • Movie