An outing takes a sinister turn for three teenage friends (Anya Taylor-Joy, Haley Lu Richardson, and Jessica Sula) when they are kidnapped by a ruthless stranger (James McAvoy) and imprisoned in his basement. They soon learn that their captor has multiple-personality disorder, forcing them to plot their escape without ever knowing which of his 23 personas -- young or old, male or female, benign or monstrous -- they will confront on the way out. Written and directed by M. Night Shyamalan.