Aditya Roy Kapur, who has been giving shape to OM: The Battle Within since December, is set to film the climax. Well aware that preceding action sequences are merely the build-up to the climax, producer Ahmed Khan and director Kapil Verma have designed an elaborate set-piece for the final minutes of the movie. A huge set of a prison has been constructed at Film City in Goregaon for the ongoing seven-day schedule.

“The set is spread over a kilometre, as envisioned by Kapil. The producer-director duo don’t want to leave any stone unturned in making the sequence memorable and have roped in an international stunt director to design it,” reveals a source.

Khan, who has given Bollywood high-octane action thrillers in the second and third instalments of Baaghi, says he wanted to up the ante with his upcoming offering. “We have brought action director Kecha Khamphakdee from Thailand on board to design the stunts. He has previously worked with me on my directorial ventures. Action director Parvez Shaikh is supervising the stunts,” says the producer, adding that Kapur’s intense training in martial arts and assault weaponry paid off during the shoot.

It is heard that leading lady Sanjana Sanghi will stand shoulder-to-shoulder with Kapur, taking on the baddies. Khan, who is backing the venture with Zee Studios, confirms, “Sanjana will be seen performing stunts.” With some songs remaining to be shot, the makers are planning to release the thriller in the second half of the year.