Arumpon is a village youth from Tirupathur who has a beloved step sister Thulasi. Arumpon holds Puberty Showering function for his sister despite hesitance from his maternal uncles, who disregard Thulasi for unknown reasons. Even his paternal uncles disregard Arumpon's family and consider Thulasi as a curse on their family. The only people who care for Arumpon's family are his grandfather Arunmozhivarman and his cousin Paramu. Arumpon develops an Affection with his Maternal cousin Maangani, despite her father's disapproval. Arumpon actively looks for an Alliance for his sister because his maternal uncle disapproves Thulasi to be married of to their sons. Despite Arumpon finding a prospective groom for his sister, his paternal uncle foils it, and Thulasi's engagement is called off. Arumpon and Paramu have a running feud with Ayyanar, a ruffian and his uncle, since they close Ayyanar's liquor shop and stopped them from selling agricultural land via a court order. So, Ayyanar decides to marry Thulasi for retribution. Arumpon reluctantly agrees to the marriage on his mother's and Thulasi's insistence. It is revealed that Thulasi is Arumpon's adopted sister who was the daughter of Dharma, a close friend of Arumpon's late father Chandrabose, who adopted Thulasi after Dharma's death. Chandrabose later got killed after failing to save Esakki, Thulasi's biological brother, from getting electrocuted due to a faulty wire caused by Chandrabose's enemies.
Ayyanar tries to insult Arumpon at every turn, but Arumpon takes it with a light-heart since he is his brother-in-law. Thulasi was falsely arrested for Ayyanar's illegal liquor hoarding. When confronted by Thulasi, Ayyanar hits her. Arumpon mercilessly thrashes Ayyanar for retribution. Following this incident, Ayyanar's close friend Paari comes with men to seek him and go after Arumpon for retribution. In a heated exchange, Paari insults Ayyanar for getting beaten up by his brother-in-law and in a drunken stupor, Ayyanar kills Paari accidentally. After realising what has transpired, Paari's men attempt to kill Ayyanar. Ayyanar escapes from them but not with closely trailed by men out for blood. No one comes for Ayyanar's rescue even his Maternal uncle, but Arumpon, and Thulasi manages to rescue him and handover to the police. Enraged by this, they seek to kill Arumpon too. To end this problem without bloodshed, Arumpon, his mother, and his sister surrender to the panchayat of Paari's Village. He explains that he knows the suffering of growing up without a father and wants to end this without further loss of life. Even though he can beat up every goon there and escape, he does not wish to do so. He offers to marry Paari's widowed Wife, but she compliments Arumpon's good nature and not wanting to make Thulasi widow agrees to end this peacefully.
During the film's closing credits, it is intended that Arumpon, Thulasi, and his mother have reconciled with the rest of the extended family. Ayyanar has been released on parole to attend Thulasi's Seemantham(Baby shower) and it is revealed that he made peace with Arumpon. The film ends comically with Arumpon breaking the fourth wall mimicking his grandfather.
The first single,"Yenga Annan" was released on 23 August 2019 with lyrics by Vignesh Shivan and sung by Nakash Aziz and Sunidhi Chauhan. The second single "Mailaanji" was released on 28 August 2019 with lyrics by Yugabharathi and sung by Shreya Ghoshal and Pradeep Kumar.[9][10]
The full soundtrack was released on 1 September 2019, with Sivakarthikeyan, composer Imman, director Pandiraj and other cast and crew in attendance.[11] The launch event was telecast on Sun TV, on 8 September 2019. After the film's release, an additional song from the film titled "Yenakkaagave Poranthavaley" which is sung by Sathyaprakash and written by Yugabharathi was released on 8 October 2019 through all digital streaming platforms.[12]
The Times of India rated 3 out of 5, stating that "As a family drama, Namma Veettu Pillai is perfectly OK even though it offers us nothing new in terms of story or treatment."[13]
Sify rated the film 3 out of 5 stars, viewing that "Namma Veettu Pillai is a well made rural family drama which is highly recommended!"[14]
The Indian Express rated the film 3 out of 5, and summarised that "Barring a few missteps, this Sivakarthikeyan-starrer is a definite crowd-pleaser."[15]
India Today rated the film 2.5 out of 5 stars and summarised that "Director Pandiraj's Namma Veetu Pillai starring Sivakarthikeyan is reminiscent of the filmmaker's previous film Kadaikutty Singam. However, the emotional connect seems to be missing in Namma Veetu Pillai."[16]
Baradwaj Rangan of Film Companion South wrote " With better writing throughout, the climax would have made you weep. But, as empty emotional entertainers go, Namma Veettu Pillai isn't a total loss".[17]
Box office
The film collected ₹50 crore (US$7.79 million) in Tamil Nadu on 5 weeks.[18]
Legacy
The song "Jigiri Dosthu" inspired the title of a 2023 film.[19]
