A young man is released from an asylum and returns home for revenge on his aunt and her three daughters, who had him declared insane in order to steal his inheritance.　　一名年轻人从精神病院被释放，回到家中，报复他的姨妈和她的三个女儿，因为她们为了夺走他的遗产而宣布他疯了…

主角是一个十几岁的少年侏儒——斯尼基，终日埋首于树屋实验室的他，希望有朝一日能够发明能飞行的小工具.斯尼基有位同学的父亲雅勒，一直希望自己儿子能跟着斯尼基，一起成为科学家。于是，两人常常窝在树屋内研究发明，偶尔也不免会对…