Sparking the inferno

Takes place before the the master plan.... where Gerard has Stiles in the basement..... but an AU.... here he wants to sent a strong message to Scott and Derek.....he doesn't follow the code.... and he doesn't mind..no he enjoys killing humans ... just as much as he likes killing monsters..... and he has a helper....Allison..... she has taken down Erica and Boyd.... and now she'll help grandpa with Stiles......why isn't Scott or the rest looking for him.....