It stars Keerthy Suresh, alongside M. S. Bhaskar, Ravindra Vijay, Devadarshini, Jayakumar Parameswaran Pillai, Rajeev Ravindranathan, Anandsami, Rajesh Balachandiran and Aadhira Pandilakshmi.

Kayalvizhi Pandian, an upper-division clerk at the Valluvenpettai branch of the Madras Central Bank, is a fervent feminist and anti-Hindi imposition activist.

Previously, Kayal and her grandfather, Raghothaman "Raghu Thatha", had successfully shut down the Bharathiya Bhasha Ekta Sabha, a Hindi organisation run by Ranganathan in their village, a feat celebrated by the villagemen.

Distraught, Raghothaman expresses three final wishes: to savour biryani at Buhari Hotel in Madras, take a photo with M. G. Ramachandran, and see Kayal married.

She proposes to Tamilselvan "Selvan", an engineer older by seven years and friend who shares her progressive values and works on transmission towers for the benefit of the people.

However, Kayal's world is turned upside down when she receives an anonymous letter revealing her true identity as a female writer using a male pseudonym.

However, Ranganathan crashes the wedding to announce the reopening of the Hindi Sabha, prompting Kayal to interrupt the ceremony and vow to stop him.

When Selvan pretends ignorance about the reason for stopping the marriage and innocently asks for an explanation, Kayal accuses him of being impotent, hoping to provoke his true intentions.

Despite his earlier pretenses, Selvan still attempts to portray himself as a reformed man, for which his mother sees through his facade and slaps him, putting an end to the marriage.

Suman Kumar, who previously co-wrote the streaming series The Family Man would be making his directorial debut with the film titled Raghu Thatha featuring Keerthy Suresh in the lead role.

[9] M. Suganth of The Times of India gave 3.5/5 stars and wrote, "the film's biggest charm is the light touch that Suman brings to a premise that could have easily become a heavy-duty drama.

Part of the credit for this should also go to his composer Sean Roldan, whose jaunty score helps the director present even something as tragic as cancer with complete insouciance".

[12] Janani K of India Today gave 2/5 stars and wrote, "Despite its potential, Raghuthatha falls short of being a brilliant satire on Hindi imposition and patriarchy".

[13] Jayabhuvaneshwari B of Cinema Express rated 2/5 stars and wrote "Raghu Thatha boasts strong performances but falters in its inconsistent narrative and underdeveloped ideologies, leaving the audience confused and unsatisfied despite promising moments".

[14] Latha Srinivasan of Hindustan Times wrote, "On the whole, Raghu Thatha is a misfire and a tiresome watch that neither makes us laugh nor cheer for Kayal".