Forget

Every night after the siren the establishment sets every mind of kids ages 12-18 "free". All memory of who the child is during the day is wiped and they turn into who they really are. Some turn into protections some turn weak who are the ones who need protected and some turn into criminals and even murderers. Then the next morning a sharp whistle returns their memory's of who they are but not of the pervious night. There is just a black gaping hole of information. What happens if some begin to remember the events of the pervious night?