The Death Threats - Part 1

Seema, an actress, gets very angry on the set of her movie as her role was passed to another actress called Riya. Later on the set, Riya gets a threatening note asking her to leave the film or she will be killed. CID is then called to investigate the case and find out who could be sending these threats to Riya. As the team starts their investigation, they come to know about a man called, Vikas, Riya was all set to marry but left him once she became a film star. Is this a case of a jilted groom taking his revenge? Or just a publicity stunt?