In a world devastated by a mysterious epidemic that spreads through spoken language, society has collapsed into chaos and fear. People become infected simply by hearing certain words or conversations, slowly losing their sanity. Murat, a former linguist, discovers that he is the only person who appears to be immune to the disease. His strange resistance is connected to a rare condition known as “Hot Skull”, which makes him extremely valuable and dangerous at the same time. As authorities begin searching for him to study or control his immunity, Murat is forced to escape the protected safe zone where he once lived. His journey takes him through the deserted and crumbling streets of Istanbul, where he encounters survivors, hidden dangers, and the haunting remnants of a once vibrant city. While trying to stay alive, Murat also searches for the truth behind his condition and the origin of the epidemic, hoping that understanding his immunity could hold the key to saving humanity.