Arjun Y K's concept crime drama has a clever setup: the sole witness to a murder is a man who suffers from face blindness. Surya watches a woman pushed in front of a train haunted by the thought that he would be unable to recognize the killer even if he were staring right at him. Prosopagnosia. It's a real thing. The doctor who diagnoses Surya explains as much for his benefit as for the audience: the head trauma from the car accident that killed his parents and injured his friend Vignesh (Viva Harsha) is permanent and incurable. And as an afterthought, the doctor adds that Surya has Phonagnosi....