What are the major events that happen in order in the juvie three?

It's about three boys who are taken out of separate detention centers and are put in a halfway house. It's going good until Douglas Healy gets knocked unconscious while stopping a fight. The boys take Healy to an emergency room, not knowing that he has amnesia and doesn't remember anything. After a while, Healy gets his memory back and is ready to take his place again in the halfway house.