Simhadri, an orphan and kind-hearted young man, grows up under Ram Bhupal Varma's family in
Visakhapatnam. Simhadri and Varma share a bond like father and son, and Simhadri is very obedient towards the latter. Kasturi is Varma's granddaughter and she develops feelings towards Simhadri. Simhadri visits Indu, a mentally challenged girl, once a week and entertains her. He also gives money to the caretakers, but hides about Indu to Varma. Varma discovers that Kasturi wishes to marry Simhadri, and decide to get them married. On the wedding day, it is revealed that Simhadri is close to Indu and the marriage gets cancelled when Simhadri refuses to leave Indu (who is suspected to be his mistress). Meanwhile, two separate groups are in search of Simhadri, and they find him at the banks of river
Godavari, along with Indu. During the ensuring confrontation between one group and Simhadri, Varma and his family are shocked to see Simhadri's violent transformation. Later, Simhadri is helped by the second group led by Namboothri, who calls him Singamalai Anna. Indu gets injured during the fight and regains her senses, where she suddenly remembers her past and stabs Simhadri with an iron pole. Simhadri is hospitalized in critical condition. Namboothri, who was searching for Simhadri earlier, explains about Simhadri's past.
Past: Saraswati, Varma's older daughter, elopes with her lover Aravind, a Keralite. After some harsh words and sadness over Varma's rejection of choice to marry her lover, Saraswati settle in
Kerala with Aravind. Simhadri learns about the sadness surrounding Varma and his wife. He takes up the job of reuniting the family and visits
Thiruvananthapuram. Simhadri joins the medical and spiritual therapy
spa, operated by Saraswati and her family, under the disguise of a patient. Simhadri meets Indu, Saraswati's daughter and Varma's first granddaughter, and finally convinces Saraswati and his family to reunite with each other. However, Saraswati is killed by Bala Nair, a local goon, for witnessing a homicide done by him. Bala and Bhai Saab controls the mafia of Kerala and belong to the same syndicate. Simhadri gets enraged and eradicates Bala and his small gang, thus taking the law into his hands. The local Kerala people begins referring him as Singamalai Anna. Simhadri finds himself transforming into Singamalai and eradicates Bhai's illegal activities. Indu finds herself lonely and constantly worrying about Simhadri. She tells her father that they should leave for
Andhra Pradesh as she cannot stand their home without her mother and Simhadri. While Indu and Aravind leaves for the train station to
Visakhapatnam, Simhadri learns that Aravind is carrying a bomb in his briefcase. Simhadri tries to stop Aravind, who is rushing to catch a moving train and Indu is about to lend him a hand. Unable to warn him, Simhadri has two choices; whether to let Aravind die so that people on train can live or let the bomb kill everyone on board, including Indu and Aravind. Upon remembering his foster father's advice that if many lives can be saved through sacrifice, there is no problem doing so, Simhadri chooses the first option and shoots Aravind. Shocked at Simhadri's actions, Indu jumps off the train and she gets hit her head against a pole, causing her
amnesia and becoming mentally challenged.
Present: Simhadri survives and Indu apologizes for her actions. He also reunites with Varma and his family. Bhai and his men arrive to finish Simhadri at the hospital, but Simhadri takes down Bhai and his henchmen with the help of his family, police officers and his friends. == Cast ==