However, the relationship between the two Karthiks sours when the real Karthik threatens to cut off the calls. The voice turns malevolent, threatening to ruin his life. What follows is a descent into paranoia, psychological distress, and a frantic attempt to uncover who is on the other end of the line.
"Karthik Calling Karthik" is a thought-provoking Tamil film that explores the themes of self-discovery, friendship, and the power of the human spirit. Released in 2010, the movie stars Vijay Deverakonda and Samantha Akkineni in lead roles. The film's narrative revolves around Karthik, a young man who receives mysterious phone calls from an unknown number, which sets him on a journey of self-discovery.