秀才柳毅赴京應(yīng)試途經(jīng)涇河畔見(jiàn)一牧羊女悲啼詢知為洞庭龍女三娘遣嫁涇河小龍遭受虐待乃仗義為三娘傳送家書入海會(huì)見(jiàn)洞庭龍王叔錢塘君驚悉侄女被囚趕奔涇河殺死涇河小龍救回龍女三娘得救后深感柳毅傳書之義請(qǐng)叔錢塘君作伐求配柳毅為避施恩圖報(bào)之嫌拒婚而歸三娘矢志不渝偕其父洞庭君化身漁家父女同柳家鄰里相處與柳毅感情日篤遂以真情相告柳毅難辭遂訂齊眉之約結(jié)為伉儷