A young and gifted scientist invents a special device to differentiate sounds in the atmosphere. By chance, he hears the sound made by fleas and starts to communicate with them. Having lived on human blood for such a long time, fleas have started to show human-like behaviors and they have started to think like human beings. One day, fleas decide to work together to make life easier and happier for the human kind. This leads to a number of funny and surprising events around the world, from schools to space shuttles. No matter how hard they try, the people are unable to solve the mystery behind these strange events…