A few Scientists, experimented on a group of teens between sixteen and nineteen who have lost faith in god. They increased there hormones or other things to a heightened single desire, or feeling. For example they heightened lust into one of these kids sent the kid out into the public to see how they would react with others. Thus creating the seven deadly sins among a few kids in the city. Though when ever a sin doesn't get what they want they go crazy. Lust would get force with whoever they are with, gluttony would try to eat whatever they could, and so on. But other then that little set back the scientists are pleased with the out come.