Like most 12-year-olds, Niles and Holland like to get into mischief. The only problem is when Holland gets into mischief, people have a funny way of "accidentally" dying. Niles knows that Holland is responsible for all the gruesome accidents happening in the neighbourhood - the pitchfork hidden in the hay, the severed finger in the box, the baby in the wine barrel. He knows but dare not tell anyone, not even his beloved grandmother Ada (Uta Hagen), that Holland is the evil twin - or is he?