Highlining is the sport of walking a slack rope strung between two peaks, nothing below but air, and filmmaker Seb Montaz spent eighteen months in the Mont Blanc range with the climbers who do it. He shot alongside members of the Bad Slackliners Team as they rig lines across gaps in the French Alps, balance out to the middle, spin tricks, and sometimes fall, caught only by a leash clipped to the rope. Aerial footage from Mathias Lopez and Dino Raffault pulls back to show the actual scale of what these lines cross, ridgelines and cols with nothing underneath but exposure. There is no narrator walking you through technique or motivation; the camera stays with the highliners themselves, filming each other because Montaz is one of them. The result reads less like a sports profile than a home movie made by people obsessed with a specific, dangerous pastime, more interested in capturing the feeling of standing on a rope above the Alps than explaining why anyone would.