The 6th Friend (2016)

In this slasher film with a paranormal twist, six college best friends throw their own private graduation party when the stoner of the group orders in a psychedelic from her drug dealer, who sticks around to join in their fun. Drugged and disoriented, the girls' special night quickly becomes a dark, foggy nightmare of blood and violence. Five years later, the girls gather together once again in hopes of rekindling that close friendship that they once had, only to find themselves being hunted by who, or what, they do not know.