It has been just a few months since officer Durai Singam arrested international drug lord Danny. A tough debate occurs within an Andhra Pradesh state assembly about the long pending murder case of Visakhapatnam City Police Commissioner Ramakrishna. The Home Minister of Andhra Pradesh proposes recruiting Singam from Tamil Nadu to Vizag as the new DCP, by order under the CBI. As Singam arrives in Vizag station, he fends off an attack from goon Gun Ravi, who works for Vizag’s most influential and powerful don Madhusudhana Reddy. Si 3 2017 full Movie
Singam starts to behave as a free end officer and secretly investigates the murder of commissioner. Singam is followed by Vidya, a journalist in guise of a student hoping to write a story on Singam. Singam had previously covered his relationship with his wife Kavya Mahalingam to keep her away from enemies, and after curiosity from Constable Veeram, he closes it as a divorce, revealing it only to Inspector Subba Rao.
After briefly confronting Bheemli Selvam, Reddy’s man who ordered the attack at the train station, Singam finds that a constable at the station has gotten sick from consuming an expired medicine tablet. With help from a paroled hacker named Murali, Singam tracks Mallaiya who drove Ramakrishna to Vizag harbour on the night of the murder. A local schoolteacher informs Singam that a toxic smoke attack from the nearby dump killed his 32 students, including his grandchildren. Singam realizes that Ramakrishna intended to expose illegal dumping of mediwaste and electronic waste, which included recycled tablets being sold to the public and the smoke attack on the school.
The garbage is being imported by Vizag Scraps owner Rajeev Krishna in exchange for free metal scrap delivery to steel companies in Australia. Mallaiya confirms that Reddy, who authorizes this business in India killed Ramakrishna to prevent him from thwarting his operation. Both Reddy and Rajeev’s activities are supervised from by wealthy Australian Export minister and Businessman named Vittal Prasad, who receives full support from his father, Union Minister Ram Prasad. In the meantime, Vidya writes an article on Singam claiming that he exported Reddy for personal gain and that he is corrupt, putting Singam’s reputation at edge.