The monster, which looks like a nastier version of The Creature from the Black Lagoon, invades a sleepy lighthouse town. The superstitious lighthouse keeper is worried for the safety of his beautiful teenage daughter, so he leaves food for the monster, who dwells in a nearby cave. When bodies wash up ashore, the locals…

凡尔杜先生（查理·卓别林 Charles Chaplin 饰）曾经是一名银行的职员，跟妻子莫纳（Mady Correll 饰）和儿子皮特（Allison Roddan 饰）一同过着平静但是幸福的生活。经济大萧条的到来令凡尔杜先生失去了工作，有一个家庭要养活的他流落在街头无处容身，绝望之情溢于言表。　　一次偶然中，凡尔杜先生得到了一种神奇的毒药，它能够杀人于无形之…