What is the summary of the possibility of evil?

InThe Possibility of Evil Adela Strangeworth lives in a town she considers "her own". Her grandfather built the first building. The house she lives in has been in the family for three generation as have her prized possessions the rose gardens that most everyone in the town envies. In this tight-knit community it seems as though everyone has been a bit sad for a week or so. One girl, Linda ran from her home crying not caring who saw. Adela has been writing nasty letters to everyone about town gossip she's overheard. They are never signed and written in childish handwriting. This has been going on for a year now. She walks to the post office to give the letters and overhears a conversation between Linda and her boyfriend. She doesn't realize she has dropped a letter. Linda's boyfriend says he will deliver it, after not being able to get Adela's attention. The next day Adela, who doesn't know she dropped the note finds a letter written on green paper, in the same childish handwriting suggesting she should look at "what used to be her rose garden." It cuts off there making you assume people have destroyed her precious roses.