Karthik Calling Karthik

Karthik Narayan (Farhan Akhtar) is an introvert who lacks confidence and feels trapped in his average job at a construction company. He is continuously troubled by an incident from his childhood: His older brother, Kumar, used to torture him, but whenever he complained to his parents, they did not believe him. One day, Kumar took Karthik to a well and tried to throw him in it, but Karthik escaped. Kumar accidentally fell inside the well and died. Karthik has thought himself responsible for his brother's death ever since.