Ranbir Kapoor and Alia Bhatt’s film Brahmastra is set to release this September. The countdown has now officially begun with the release of the trailer. Brahmastra Part One: Shiva marks Ranbir and Alia’s first film together. The Ayan Mukerji directorial also stars Amitabh Bachchan, Nagarjuna and Mouni Roy in pivotal roles.

Karan Johar, who is producing the film via Dharma Productions, had confirmed Shah Rukh Khan will be making a cameo in the film. The new trailer takes fans into Ayan’s Astraverse. The trailer, which features a voiceover by Amitabh Bachchan, reveals that the story of the film is about the god of these astras — Brahmastra and a young boy named Shiva (Ranbir Kapoor) on whom the destiny of Brahmastra depends.

The trailer offers a glimpse of his simple life as a DJ and how he falls head over heels for Isha (Alia Bhatt). But life takes a startling turn for the couple when Isha learns that Shiva has a connection with the element fire. The trailer then introduces the warriors who are protecting ancient weapons of light.

The warriors are played by Amitabh, Nagarjuna and more. Ayan also gives a glimpse of the villain of Brahmastra, played by Mouni Roy. As the trailer progresses, Shiva learns to control his powers before he has an epic battle against the villain.