Kalank revolves around a small town family and their elder daughter Radhika. It so happens that Arjun and Radhika fall in love and marry without anyone’s knowledge. Radhika finds out soon that Arjun is not a good guy, in a rage of anger Radhika ends up in a terrible fight with Arjun. This incident leads to something unusual as both go missing, police get confused, investigation happens and finally the shocking truth gets revealed.