Dr. Emma Harper, a seasoned psychologist, takes on the challenging case of Alex Mercer, a patient with dissociative identity disorder (DID). Beneath the surface of this complex condition lies a web of suppressed memories tied to a mysterious and traumatic event. As Emma delves deeper into Alex's fractured psyche, the boundaries between reality and the subconscious blur, leading both therapist and patient on an unexpected journey of self-discovery and healing.