"Poseban tretman" is a Serbian film directed by Marko Djordjevic. The story follows a young woman named Jelena who decides to undergo a special treatment at a mysterious spa in the mountains. As she goes through the treatment, she starts experiencing strange and unsettling events that make her question the true nature of the spa and its staff. As Jelena delves deeper into the secrets of the spa, she uncovers a dark and sinister truth that puts her own life in danger.