"Edison and Billy finally have a chance for a vacation, joining Amira to celebrate her birthday on peaceful Mushroom Island. But before celebrations can get underway, Mushroom Island is rocked by a mysterious explosion. As they investigate it, they discover rumors that the island itself is cursed. Of course, Edison and Billy don't believe in curses. There must be a logical explanation behind the explosion, and they just have to find it. So not only do they have to solve the mystery, but they have to prove to their friend and the residents of Mushroom Island that there is no such thing as a curse."-- Back cover.