Haiwaan is a gripping thriller centred on Shyam (Saif Ali Khan), a blind caretaker working for retired judge Pradhan (Boman Irani). When Pradhan is murdered, Shyam suddenly finds himself responsible for the safety of a young girl. Before his death, the judge warns him about Parshuram (Akshay Kumar), a dangerous psychopath who has recently been released from a mental institution. Driven by a traumatic past, Parshuram is determined to hunt down and kill every man he holds responsible for his suffering, sparing no one who stands in his way. As the threat closes in, Shyam must rely on his heightened senses—particularly his extraordinary sense of smell—to track down the ruthless killer. Can Shyam overcome his limitations and confront the terrifying antagonist before it is too late?