Happy Birthday is a Telugu film directed by Veera Reddy. Chennamaneni Sreedhar(Rahul,) Sanjana Garlani (Lisa,) Jyoti Sethi (Rhea) and Sravan Raghavendra (Ravi) play the key roles. The story starts with an ad film director Rahul and model Rhea, both their birthdays are on the same day. They have planned their birthday celebrations in a guest house, where things take a different turn. Suddenly a stranger enters into guest house hits Rahul and knocks him down. After sometime Rhea is also attacked by someone. Who attacked Rahul and Rhea? Why did they do this? What is the reason behind the attack? This is the rest of the story.