Nikolas starts seeing Emily, and initially believes she is a ghost. However, he later finds out he has a brain tumor, allowing him to hallucinate Emily. Emily, as Nikolas' hallucination, helps Nikolas track down her killer, Diego Alcazar, the Text Message Killer. Diego dies after a struggle with Nikolas, ending his reign of terror and avenging Emily's death. After debating with his hallucination of Emily, Nikolas opts to remove his tumor. He wakes up from the surgery, holding the engagement ring he gave Emily the night she died.