One dark and stormy night, Martin decides to cut his weekly chores a little short and leave the trash bag by the garage instead of fetching the plastic garbage bin. In the morning, he discovers that something has gotten into the bag and has spread trash all about. "Was it a bear?" wonders Sylvia. "Too big", says Daddy. "A mouse?" wonders Sylvia. "Too small", answers Daddy. "I know", she says, "It was Trash Fairies!"