Willi Weitzel has already made many trips, but he wants to immerse himself in the diverse, colorful, and fantastic world of brightly colored and charming amphibians. Willi’s 11-year-old neighbor Luna and her grandmother, a mysterious old lady and amphibian researcher, instigated him on this trip. Along the way, he learns about the miracle toad, the ancient and wise Bufo Magicus, who can change her shape and foresee the future. Oddly enough, this miraculous toad looks like Luna’s grandmother!