A long time ago, some mice lived happily in a colony in the forest. There was a big lake located near their colony. Once, a herd of elephants visited the lake for drinking water. On their way to the lake, the elephants trampled many small mice under their heavy feet. After that they started coming to the lake every week. Whenever they came, they killed many mice by walking over them. Due to this, the population of the mice was getting affected.