Because Mush-Mush, Chep and Lilit are always up to new adventures, Bolly has dubbed them The Adventurers. Flattered, our friends invite Bolly to choose his challenge to become an Adventurer too. Bolly will have to be the first Mushable to set foot somewhere. Mushton being crowded, Mush-Mush suggests they find an island, somewhere on the giant lake...