Kartha karma kriya

Sidhu is a playful youth who works in a mobile store. His only aim is to earn easy money. As time passes, he falls in love with Mythri who in turn is looking for the murderer of her sister. Knowing this, Siddhu starts helping Mythri and finds out that there are two other girls who have died in the same manner as her sister. Who is the murderer and what did he gain forms the rest of the story.