O2 (2024) is a gripping Kannada medical thriller that follows the journey of Dr. Shraddha Nayak, a brilliant anesthesiologist working on a groundbreaking injectable oxygen drug to revive the dead. Battling her own traumatic past, Shraddha's quest pushes the boundaries of science, spirituality and love. Directed by Raghav Nayak and Prashanth Raj, O2 offers a unique blend of medical research and emotional storytelling, anchored by Ashika Ranganath's powerful performance.