Meanwhile, here is the story in brief that has been rumored to be the story of Iddarammayilatho. Allu Arjun is a contract Killer but due to interest in music, he performs few dance shows in neighborhood. Arjun falls in love with Amala Paul and his enemies from mafia kills her intentionally. This brings a big change in him dedicating his life to music forming a rock band and Catherine Theresa joins his band.
As expected both fall in love, eventually mafia people attack her too and unfortunately Catherine dies. Then Arjun get backs on a killing spree, who is responsible for death of Amala and Catherine. Let's wait until the movie's release to known whether this is really the story of the Iddarammayilatho or not.