Twisted Rhymes

Nursery rhymes can be defined as verses or short songs that we often read or sang when we were young. Always played with a joyful music. So children and even adults can enjoy it. Children dance as the music played. Sometimes they even sing along with it. But way back in the past, in a small town somewhere on Earth, things are different. These so-called children's songs means death.
But what exactly is the relation between these songs to the people? Is it a curse? and will there be any solution to such tragedy?