Mangalavaaram (transl. Tuesday) is a 2023 Indian Telugu-language psychological mystery thriller film written and directed by Ajay Bhupathi. It is produced by Swathi Reddy Gunupati, Suresh Varma M., and Ajay Bhupathi, under Mudhra Media Works and A Creative Works. The film features an ensemble cast including Payal Rajput, Nandita Swetha, Priyadarshi Pulikonda, Divya Pillai, Ajmal Ameer, Chaitanya Krishna, and Ravindra Vijay.

The music was composed by B. Ajaneesh Loknath with cinematography by Dasaradhi Sivendra and editing by Madhav Kumar Gullapalli. The film released on 17 November 2023.

In 1996, life in a village appears peaceful. A mysterious series of murders then occurs twice: before each killing, someone writes on the wall of a house, accusing a married woman and a married man of having an illicit affair. Soon after, the accused individuals are found dead. The villagers initially believe the victims committed suicide out of shame, until police inspector Maya notices suspicious clues at the crime scenes, suggesting that both cases were murders. One week later, villagers apprehend a young man named Nani while he is attempting to write on a wall and hand him over to the police. However, Maya soon releases him after reviewing the postmortem reports of the previous victims, concluding that he cannot be the killer. Around the same time, the village doctor, Viswanatham, claims to have seen the ghost of a villager named Sailaja, sparking a terrifying rumor that Sailaja's vengeful spirit is committing the murders.

One year ago, Sailaja, who was mentally disturbed and suffered from nymphomania, had some casual sex with some men in the village. She was harshly judged, and many men began to harass and exploit her. When the village headman Prakasam learned of this, he ordered Sailaja to be expelled from the village. Shortly afterward, Sailaja was found dead after falling into a well.

One week later, Maya catches the real killer—Viswanatham—while he is once again attempting to write names on a wall. Maya had deduced his involvement from the postmortem reports, which revealed that anesthesia had been used to sedate the victims before their deaths, making Viswanatham the prime suspect. Viswanatham resists arrest and attacks Maya, knocking her unconscious. She later wakes up tied inside Viswanatham's house, where they confront each other, and Viswanatham reveals the truth.

When Sailaja was alive, Viswanatham showed empathy and tried to help her, medically and emotionally. He tried to treat her and brought back Ravi - Sailaja's childhood love interest, who was deemed dead 10 years ago - to her. Ravi and Sailaja planned to marry and leave the village together, but before they could do so, Prakasam ordered Sailaja to be expelled. Sailaja did not commit suicide after being driven out; she was murdered. Earlier, she had accidentally witnessed Prakasam's wife, Rajeswari Devi, having an affair with photographer Vasu. To protect her reputation, Rajeswari manipulated Prakasam into expelling Sailaja and later arranged her murder with the help of several villagers. Viswanatham and Ravi decided to avenge Sailaja's death. Together, they killed four people involved in the crime, writing their names on the walls before each murder. As Viswanatham narrates this to Maya, Ravi kills Vasu, leaving Rajeswari as the last person responsible for Sailaja's death.

Prakasam, who has returned to the village to investigate the ongoing murders, overhears the confrontation between Viswanatham and Maya. After returning home, he kills Rajeswari by burning her alive. He later tells the villagers that Rajeswari sacrificed herself to Mahalaximi to end the cycle of deaths and save the village.

At the end, Maya allows Viswanatham to go free, choosing neither to arrest him nor to reveal the truth to the village.