A 23-year-old man believed that a musician he saw on social media was actually his identical duplicate, causing him significant distress and confusion about his own identity. His belief that he might be the ‘dead’ version persisted for years until he sought psychiatric help due to worsening symptoms. Treatment with the antipsychotic medication olanzapine, combined with therapy, successfully reduced his delusions and hallucinations within five days of hospitalization. This rare condition highlights how certain psychiatric disorders can cause profound disturbances in how people perceive their own identity.