Faction feud in Tamil Nadu results in the death of Singaraayor's (Nagineedu) brother and he, along with his two sons Dharma (Ravi Prakash) and Kaali (Sugunthan), vow for revenge. Time turns and comes to Chennai. Here lives Sakthi (N. Santhanam), an innocent and somewhat unlucky guy whose parents are no more and is ousted out of his job. His life takes a turn with a correspondence that he has got five acres of land in his hometown in Tamil nadu. He decides to sell that land and sets off to the village. In this process, he also meets Vaanathi (Ashna Zaveri) who is the daughter of Singaraayor. However, much to Sakthi's bad luck, he happens to be the son of the man who killed Singaraayor's brother and he ends up in their home itself. He takes advantage of a tradition of their house that not even one drop of blood should fall inside the house.Vaanathi falls for Sakthi in the mean time.He escapes in all the plans much to the furious Singaraayor.Soon the story takes a twist when Vaanathi,not knowing that Shakthi is the son of the man who kiled her father's brother ,falls for Shakthi. Raja comes to know about this and refuses to marry Vaanathi. When Raja tells this to Singarrayor, he slaps him. And in the wedding Dharma carries Shakthi away from the temple to kill him. It is then revealed that Shakthi is still in Singaraayor's mansion. Then he runs away from the house only to be chased by Singaraayor's men.But Shakthi narrowly escapes from his death and is saved by Vaanathi. When he crosses a bridge which is located at a very high place, he refuses to let Vaanathi come with him and now Vaanathi comes to know the truth and is heartbroken. Soon Singaraayor and his men arrive to kill Shakthi. He somehow escapes. But suddenly Vaanathi tells her father that she was the one who loved Shakthi. Shakthi has a change of heart and decides to go back to Singaraayor to express his feelings to Vaanathi. Singaraayoor orders his men to beat Shakthi badly. Vaanathi cannot bear this and she jumps from a bridge into a river and Shakthi in turn jumps into the river to save her. Shakthi saves Vaanathi. Singaraayor forgives Shakthi and in the end Shakthi marries Vaanathi.
Ravi (Ravi Teja) works as a collection agent of ICICI bank in Bangalore and leads a happy life along with his friends and his father Mohan Rao (Prakash Raj). Mohan Rao wishes to see Ravi married to a girl soon although Ravi is against it. One day, Ravi is informed that one of his friends, ('Satyam' Rajesh) has been admitted in the hospital as he tried to commit suicide by drinking nail polish solution. Upon inquiring, Ravi finds out that his friend fell in love with a girl named Shruti (Shruti Haasan). Shruti and her uncle Crazy Mohan (Brahmanandam), have a habit of cheating gullible young men in the name of love - one among whom is Ravi's friend. Ravi Decides to teach them a lesson.
Irandam Ulagam is about two stories which unfold concurrently in two different planets – our Earth and an unnamed exoplanet. On earth a timid medical student Ramya (Anushka Shetty) who has a crush on an academic mathematician Madhu Balakrishnan (Arya). He initially refuses her proposal for marriage as his father is in valid needing his full attention and care. Later, Madhu gradually reciprocate Ramya's love seeing her caring nature and proposes marriage. But, she reluctantly rejects his proposal as her family had already arranged marriage. While on a trip to Goa, Madhu wins Ramya's heart while her fiance abruptly cancels the marriage citing dowry as reason. She instantaneously dies in a freak accident and this is followed by the news of death of Madhu's paralysed father too. Depressed by the sudden twin tragedies, Madhu becomes a vagabond in Goa. He sees an apparition of his dead father that tells him death is an illusion. Later, in one of the tourist spots, he follows an empty car to a hilltop and tries to commit suicide. He gets injured and faints while trying to drive the car.
'Anal' Murugan (Vikram) a gym boy who dreams of becoming a successful villain in films lives along with Thambi Ramaiah and his gym co-boys. He bumps into an old man Dakshinamoorthy (K. Vishwanath) who is under pressure from his son Chidambaram (Avinash) to sell his orphanage to a scheming lady politician Ranganayaki (Sana) who is majorly into land grabbing along with her hatchet man 'Vaappa' Abdul Kadhir (Pradeep Rawat). Murugan eventually falls in love with Dharshini (Deeksha Seth). The one-man army Murugan becomes the Dakshinamoorthy’s saviour as Ranganayaki and her men are after them. How Murugan single-handedly fights the powerful politician and brings them to light forms the rest of the story.
Long time lovers Mohini(Poorna)and Harsha(Harshvardhan Rane) get married and move into a new community where Harsha had bought a house. Harsha’s parents come to stay with them for a few days and also to make sure that the marriage is not consummated before a certain auspicious time. Unknown to the inhabitants of the house a voyeuristic spirit lived there and it takes a certain fascination for Mohini. Unknown to Mohini the spirit follows her around every where and finds pleasure in watching her change clothes and taking a shower.