Kaun? Kaisey?

A wealthy Rakesh lives with his mother and sister he falls in love with Renu and gets married soon.While Renu is away from town he meets Roslyn at a bar and give her lift.He takes her home for glass of brandy and excuses for sometime.Upon returning he finds that Roslyn is dead after having the brandy and disposes her body in the dark.Inspector Vinod is assigned for the case but gets frequent calls from a mysterious caller to stay away from it.