Bairavaa

Bairavaa is a collection agent for ICCI Bank in Chennai, willing to employ even violent means to get back money from debtors. During his manager's daughter's wedding, he comes across Malarvizhi, a medical student from Kallidaikurichi in Tirunelveli district, and falls in love with her. He cutely talks to her and tries to get to know her. When he goes to the Koyambedu bus station to propose his love to Malar before she leaves Chennai, he notices her cornered by a group of thugs who plan to kill her as she is allegedly involved in an attack on Union Minister's son Charan. However, they back off after Periyakannu alias PK from Tirunelveli calls them and tells them not to harm her. Bairavaa confronts Malar, who reveals why PK spared her life.

Past: Malar studies at PK Medical College in Tirunelveli, whose chairman is PK, a butcher-turned-influential gangster and politician, who runs Tirunelveli along with his right-hand man, Kottai Veeran. The college has no basic facilities, including a proper building and good doctors. Malar and her friend, Vaishali, filed a complaint against the college to the MCI, who decided to suspend the college after noting the poor facilities. To save his reputation, PK makes a deal with the MCI officials to revoke the suspension in exchange for them to sleep with a girl from the college. Vaishali is the girl chosen by the officials, where she is later found raped and dead from next morning. Malar's father, who is a police officer, begins the investigation into PK's involvement in Vaishali's death, but PK kills him in retribution.

After her father's death, Malar filed a petition against PK in court, where the judge ruled that Malar could not be expelled and must not suffer harm until the court resolves the case. Though PK respects the judge's decision, he harasses Malar indirectly through the college lecturers and cuts her power and water supply. He plans to kill her once the judge declares the verdict in his favour. During the wedding, Malar gives the video evidence of Vaishali's assault to Charan since he can access the NIC to investigate the video. Later, PK's henchmen attack Charan, who takes the video evidence and blames Malar.

Present: On hearing Malar's story, Bairavaa decides to help her fight PK and get justice for Vaishali. He beats up the goons there and leaves for Kallidaikurichi with Malar. Posing as an income tax officer, Bairavaa conducts a raid at PK's mansion, taking away all the evidence which holds PK responsible for Vaishali's death. PK then rushes to Malar's house to recollect the proof, but Bairavaa won't give it up. PK can't kill him either because he won't get the evidence. He decides to spare Bairavaa and taunts him until he gets the proof. He sends Malar's brother-in-law to recollect the evidence from Bairavaa. He slaps Bairavaa, but Bairavaa hits him back and leaves him empty-handed. Kottai Veeran's goons kidnap Bairavaa and bring him to Kottai Veeran, but he fights them off.

Eventually, PK gets back the evidence and destroys them, leaving Bairavaa with no evidence to implicate PK, though he gets five more days from the court to get the required proof. Right after the court, PK's goons try to light up Bairavaa to burn him alive and do a petrol bunk murder attempt, but he makes it out alive barely. Malar's sister's daughter gets kidnapped, so Bairavaa bravely saves her, but he gets shot and hit with a metal rod. Kottai Veeran captures him, but he eventually escapes. Bairavaa then learns that Kottai Veeran's wife has died and decides to take advantage of Kottai Veeran's love for his wife to get him on his side and make him approver against PK.

Bairavaa switches PK's asthma inhaler with nitrous oxide. PK, who inadvertently inhales the gas before going to Kottai Veeran's wife's funeral, begins to laugh uncontrollably, even during the funeral, causing Kottai Veeran to turn against him and accept Bairavaa's offer of becoming approver. In revenge for betraying him, PK confronts Kottai Veeran and hacks him to death. Bairavaa lures PK's goons to an abandoned building and fights them. He gets hacked by the same weapon that killed Kottai Veeran but makes it out barely alive. He then frames PK for plotting to assassinate the Prime Minister of India while he is on the way to the Kudankulam Nuclear Power Plant. The news spreads across India, and the government orders to shoot PK on sight.

Realising that the commandos cornered him, PK tries to kill Bairavaa by shooting and choking him brutally, but Bairavaa subdues him and escapes. He then disguises himself as a NSG commando, where he blends in with the real NSG commandos, who have arrived at the building and brutally kills PK. The court declared a verdict favouring Bairavaa and Malar and shifted the PK Medical College's students to another college. In a press conference, Bairavaa revealed the importance of education and that other private colleges should also have basic facilities to educate children. Bairavaa and Malar marry and live happily. The family performs Vaishali's last rites.

Keerthy Suresh plays a college girl in the film.^[5] Rajendran plays a police officer in the film, which marks his second collaboartion with Vijay after Theri (2016).^[6] Papri Ghosh was signed as the third female lead after Keerthy Suresh and Aparna Vinod.^[7] R. K. Suresh was cast as the third villain in this movie, joining the likes of Jagapati Babu and Daniel Balaji.^[8]

On 18 September 2016, the film's title was revealed to be Bairavaa.^[9] A schedule was shot at Binny Mills in Chennai.^[10]

Santhosh Narayanan was signed to compose the film's music and collaborated with Vijay and Bharathan for the first time.^{[citation needed]} Vijay and Priyadarshini recorded a song for the film.^[11]

The song "Varlaam Varlaam Vaa Bairavaa" is played for a fight sequence in the 2017 Hindi film Golmaal Again.^[13]