6 Souls (also known as Shelter) is a gripping 2010 horror-mystery thriller from the United States that delves into the unsettling intersection of psychology and the supernatural. Directed by Måns Mårlind and Björn Stein, the film stars Julianne Moore as Dr. Cara Harding, a forensic psychiatrist whose skepticism is challenged when she takes on a patient, David (Jonathan Rhys Meyers), diagnosed with multiple personality disorder. As she delves deeper, Cara makes a horrifying discovery: each of David's alternate identities corresponds to a real murder victim, plunging her into a terrifying investigation where reality and possession blur.

The film's strength lies in its atmospheric tension and strong performances. Julianne Moore brings a compelling gravitas to her role as a rational professional confronting the inexplicable, while Jonathan Rhys Meyers delivers a chillingly versatile performance, seamlessly shifting between personalities. The direction effectively builds a sense of creeping dread, using its 112-minute runtime to unravel a complex plot that keeps viewers guessing. While the IMDb rating of 6 reflects some narrative familiarity within the genre, the movie succeeds as a solid psychological thriller with genuine scares.

Viewers should watch 6 Souls for its clever premise that goes beyond simple jump-scares, focusing instead on psychological horror and mystery. It's a film that questions the nature of identity and evil, offering a suspenseful ride with enough twists to maintain engagement. For fans of thoughtful horror and thrillers that prioritize story and performance over gore, this is a compelling choice to stream online.