Boulder travels to Ponyville from Manehatten for a geological examination of the nearby feature, Ghastly Gorge. However disaster strikes the crew due to unexplainable geological processes. Boulder does what he can as a timid leader to save his fellow workers and his new friend as well as his guide from Ponyville, Fluttershy.

Image credit goes to Quanno3: http://quanno3.deviantart.com/art/Ghastly-Gorge-270358416