Summiting Mount Everest is and always has been the ultimate achievement for any extreme sport enthusiast. Scaling the cliffs and reaching the peak at over 29,000 feet is the rush every climber has seen as a goal since as early as the 1920s.

In the 1920’s, before anyone else had ever reached the daunting peak of Mount Everest, George Mallory and colleague Andrew Irvine embarked on the same journey many attempt now in the 21st century. The new documentary The Wildest Dream describes how the two disappeared on their third attempt to conquer the mountain in 1924 and were not found for 75 years, in 1999.

Using re-enactments, archival photos and stock footage, the film investigates whether or not Mallory and Irvine reached the summit before disappearing. The trailer at HeyUGuys does a great job of conveying the intensity of the climb, but that might have something to do with the always powerful voice of Liam Neeson narrating. Co-narrators include Alan Rickman, Ralph Fiennes, and Neeson’s late wife Natasha Richardson. Fiennes and Richardson provide voices for Mallory and his wife, as this story is partly told through correspondences between the two while George took on this epic quest.

The film hits IMAX theaters across the pond September 24th and had a very small release here in the states in August, but continues to pull in money even in its limited 20 screen release. Check out the trailer below.