Iggy Boulder is the tallest igneous mountain in the Stony Mountain Range. He is minding his own business, going to school, blowing clouds around the sky, and living a normal life when one stormy morning a lightning bolt strikes him and sends him on the ride of his life through the rock cycle. Join Iggy on his ride and find out why he wasn't paying attention when the rock cycle was taught in school, why Mrs. Peak's head is on fire, and why Iggy is scared of the Mad Manto.