In Theaters September 14, 2018

In this trailer for A Simple Favor, we see Stephanie (Anna Kendrick) and her fashionable friend, Emily (Blake Lively), socializing over a round of martinis. Emily's husband describes her as mysterious and as "a beautiful ghost." Emily then asks Stephanie to travel to her home as "a simple favor," then abruptly disappears. Finally, Stephanie begins to learn that Emily is not who she appeared to be.