水國之王：水神河伯（南柱赫飾）意外來到人間，找上了命中注定必須世代作為神的僕人生活的神經外科醫生尹素兒（申世景飾），對她頤指氣使，搞得素兒原本平靜的生活雞飛狗跳。河伯與素兒的親近讓已被遣派來到人間數百年的水國管理神：武羅（鄭秀晶飾）酷勁大發，也讓暗戀著武羅的風神飛廉（孔明飾）相當不是滋味。一段神與人之間，剪不斷理還亂的奇幻愛情故事就此揭開序幕。

Most of humans living on earth believe there is another being, far superior than us. What if that being is also unbelievably attractive? (wink wink) Korea’s most “want him to be my boy friend” Nam Joo-Hyuk acts out Ha-Baek, the Water God. He is to come down to Earth in order to complete his given task.

When the narcissistic Water God Ha-Baek visits earth in order to find the God stones powerful enough to help him claim his throne, he seeks out the help of his servant and destined bride, psychiatrist So-Ah, whose family is fated to serve the Water God for generations. The problem is that she has no belief in the Gods and initially mistakes him for suffering from delusions, things get even more strange. However, when the Wind God Bi-Ryum, the Water Goddess Mu-Ra and a hotel CEO/Semi-God Hu-Ye show up to complicate things. Can a relationship between a mortal female and a god have a future?