World class climbers Stefan Glowacz and Chris Sharma compose a team to be the first to climb Majlis al Jinn, world’s biggest underground cave located in Oman. Despite the age gap big enough to make them look like a climber and a coach, they head for the perfect place together to make their climbing dream come true. As soon as they look into a hole with a diameter of 1m on the plain, there is a dome-like cave, which is 300m by 200m wide and 160m high from the bottom to the ceiling. In February of 2014, they desperately climb installing portaledges and struggling with overhangs for 12 days. As climbers talented in big wall climbing and sport climbing cope with crux zones, the film gets more interesting.