Complex sentence: Priyan is in love with his uncle's daughter Dhwani (Parvathi) who was born and brought up in Chennai.The rest of the story deals with the disturbing events in Dhwani's life and how Mithun helps her overcome those.
Split into simpler sentences: Priyan is in love with his uncle's daughter Dhwani (Parvathi) who has been born and brought up in Chennai. The later story deals with the disturbing events in Dhwani's life and how Mithun helps her to overcome those.