Chris and Martin, off to explore mountain bio-zones of Goat Mountain, bump into Paisley Paver. Paisley reveals her hideous plans for a development dubbed "Asphalt Ascent". The brothers are horrified. Thinking fast, Chris challenges her to a race to the top of Goat Mountain. Whoever gets to the peak first decides the future of the mountain ecosystem. Is there any creature in these steep slopes and dizzying heights who can help Chris to victory? Enter the mountain goat!