Tilo, a young and adventurous mole, gets the surprise of his life on his 10th birthday when his aunt Inge sends him and his three best friends on a thrilling and mysterious journey to the center of the Earth. In search of the ancient legend, The Myth of Talpa, our heroes travel through various layers of civilizations, encountering friends, foes, and adventures along the way. They are aided by Atlas Lightning, an earth-core drilling machine that acts as a fifth crew member. They search for a myth but find the truth!!!