Alex and the team reach the final phase of their epic expedition. A 4000 foot unclimbed sea wall, and one of the most important glaciers in Greenland.

The climbing team is hit by deadly ice fall before attempting a first-ever traverse of the Renland Ice Cap enroute to their final climbing objective.

A first-ever Greenlandic expedition begins as Alex Honnold leads his team across a massive glacier and attempts to free climb a 1,500-foot rock wall.