When Bula reads about a “vanishing lake” in Zula’s tabloid newspaper, Zeeter tells him that it is impossible for all the water in a lake to simply “go away”. After Multo teaches the team about evaporation and vaporization, they decide to check out the “vanishing lake” for themselves. It turns out that the lake is hoax perpetrated by the nefarious villain, Dark Truder, whose ultimate goal is to make all the water of Zula disappear by vaporizing it. He traps Truder, Multo, Bula and Zeeter, but they manage to escape, thanks to their knowledge of evaporation and vaporization. They’re too late to stop Dark Truder from removing all the water from Lake Zula, however it turns out the joke is on Truder - when he learns the hard way that vaporized water turns to rain.
