The trailer of O.M: Chapter 1 – Udhiram: The Blood Wood has been released, placing Dhanush inside a dangerous red sandalwood smuggling network with Mammootty seemingly controlling the operation from above. Released by the makers on Friday, November 13, the nearly three-minute preview also introduces Sai Pallavi as the officer leading the investigation. Directed by Rajkumar Periasamy, following his work on Amaran, the crime thriller draws inspiration from real incidents linked to red sandalwood smuggling in Andhra Pradesh’s Seshachalam forests. The film is scheduled to arrive in theatres worldwide on November 20, 2026.
Dhanush plays an undercover operative who infiltrates the smuggling syndicate while posing as a woodcutter. Identified by the code name D-402, his character is assigned to get close to the people involved in the illegal trade and uncover the larger network operating behind them. The trailer follows him through the forest, where he works alongside the smugglers and finds himself caught in increasingly dangerous confrontations. His position within the operation, however, is not entirely straightforward. Some sequences show him clashing with the police as well, leaving viewers uncertain about how deeply he has embedded himself in the network and what is happening behind the scenes. This ambiguity becomes one of the trailer’s central narrative hooks, keeping the character’s loyalties and immediate objectives open to interpretation.
At the other end of the network is Mammootty as Burma Karthikeyan, a powerful smuggler-politician whose influence appears to extend well beyond the forest. The trailer presents him as someone who operates from the shadows while others carry out the dangerous work on the ground. His political influence and control over the illegal trade make him a formidable presence in the story, setting up a confrontation with Dhanush’s undercover operative. Rather than positioning the conflict as a straightforward battle between police officers and smugglers, the preview suggests a larger network in which those making the decisions may remain far removed from the risks faced by the people carrying out the operations. The face-off between Dhanush and Mammootty is among the trailer’s biggest attractions. The film also marks Mammootty’s return to Tamil cinema after his appearance in Peranbu in 2019.
Sai Pallavi plays CBI Additional Superintendent of Police Nithya Reddy, the officer leading Operation Mole. Her character provides the law-enforcement perspective as the investigation moves closer to the people controlling the smuggling network. The trailer establishes her as a determined officer at the centre of the operation, with the investigation forming another important strand of the narrative. Director Rajkumar Periasamy has revealed that real-life IPS officer Merin Joseph influenced the visual design of Nithya Reddy. The reference helped shape the character’s appearance and composed presence, although Sai Pallavi’s role is that of a fictional officer created for the film. The casting also brings a different dimension to the central conflict, with Nithya’s investigation potentially intersecting with Dhanush’s undercover operation and Mammootty’s criminal network.
The subject of O.M has roots in real incidents involving red sandalwood smuggling and the rescue of rural woodcutters along the Andhra Pradesh-Tamil Nadu border. Rajkumar Periasamy has spoken about drawing inspiration from incidents around areas including Tirupati and Tiruvannamalai. The Seshachalam forests have become associated with the illegal red sandalwood trade, which has involved dangerous conditions for workers recruited into the operation. The film uses this setting to build a story around the people involved at different levels of the trade, from those working in the forests to the influential figures allegedly controlling the larger network. The trailer’s focus on woodcutters and undercover operations brings attention to the human dimension of the conflict, suggesting that the people carrying out the work may have little control over the decisions made by those higher up the chain.
The ensemble cast brings together performers from different film industries. Sreeleela plays Dhanush’s wife, while Indrans appears as his father. Naseeruddin Shah and Chaitu Jonnalagadda are also part of the cast, adding further depth to the film’s collection of characters. Their roles and the extent of their involvement in the central conflict have not been fully revealed in the trailer, leaving several aspects of the story undisclosed ahead of the theatrical release.
Music is composed by Sai Abhyankkar, whose score contributes significantly to the pace and tension of the trailer. The composer has also addressed fan-made AI images suggesting romantic dance sequences between the lead actors, clarifying that the film does not include such forced additions. The clarification comes amid online speculation and fabricated promotional material surrounding the project. Wunderbar Films and RTake Studios are backing the production, with Rajkumar Periasamy handling both writing and direction.
Although the trailer establishes the broad conflict, it avoids revealing every major development in the story. Its strongest hook lies in the uncertainty surrounding the characters and their positions within the investigation. Dhanush’s undercover identity, Sai Pallavi’s efforts to lead Operation Mole and Mammootty’s apparent control over the smuggling network create three intersecting narrative tracks. Each brings a different set of stakes to a story built around illegal trade, political influence and law enforcement. The real-life inspiration gives the setting additional context, while the combination of three prominent performers from different film industries gives the project a wider appeal.
With its November 20, 2026 theatrical release approaching, O.M: Chapter 1 – Udhiram: The Blood Wood is positioning itself as a crime thriller rooted in the world of red sandalwood smuggling. The trailer leaves the audience with a central question: how deeply does the network extend, and can the operation bring down the people controlling it? The answers will unfold when Rajkumar Periasamy’s film reaches cinemas worldwide.
