Widower SI Peter Kurishingal’s son Sebin, his classmate and their family were murdered in mysterious circumstances at their home. The initial police investigation, led by Bijoy Kurivila, concludes that the murders took place as part of a robbery. Because of protocol, Peter was kept away from the investigation team even after his requests to make him a part of it, but the SP allows him to do a parallel investigation.
He discovers that Stephen, whom the team pin the crime on is not the murderer. Peter is then asked to take over the investigation, which leads to the culprit and the answer to why all of a family, and Sebin who was just a visitor to the house, were murdered on that fateful day.