全家搬到新房子后，一个小男孩发现了一本神秘的书，书中详细介绍了 14 号星期六的诅咒。打开这本书，一群怪物被释放到房子里，一家人必须团结起来拯救自己和他们的邻居。

When an evil scientist steals his colleague's time machine his colleague's beautiful, brilliant daughter, aided by an L.A. cop and a hapless admirer, pursues him back to twelfth century England where - disguised as a damsel in distress - she enlists the help of a knight errant whose secret past holds the key to her future.