Underlying Secret

"Derek, please, put the gun down. I'm sorry there was nobody there for you, but this is not the way to handle this. Please, baby, put the gun down.", coaxed Stiles. When a part of Derek's past comes back, will the pack be able to pull him through? Will Derek be able to survive the struggle of reliving this hidden part of his past? Can the pack handle it when they learn the truth?