Ming-Han is a passionate policeman. One day, while arresting a criminal with his beautiful colleague Zi-Qing, Ming-Han accidentally picks up a red envelope, and a group of people suddenly jumps out and calls him their "son-in-law". They ask him to get married to their dead child, who is a dead guy! Ming-Han finds it impossible to accept this decision. However, he did not expect to meet with so much misfortune since then. Even more terrifying is that he begins to see his ghost husband Mao-Mao which scares Ming-Han to death. Ming-Han visits a great master to get rid of Mao-Mao. The master tells him that he must get married to Mao-Mao and fulfil Mao-Mao's wishes, otherwise, Mao-Mao will follow him forever. To get rid of Mao-Mao, Ming-Han has no choice but to help him fulfil all his wishes. At the same time, Mao-Mao also acts like Ming-Han’s partner to help him with a drug smuggling investigation. A fantasy journey full of laughter and tears between a straight man and a gay ghost begins. 恐同男警吳明翰 (許光漢 飾) ，誤撿地上紅包，竟然紅包裡的對象是個男的 (林柏宏 飾) ！不得不男男冥婚的明翰，一路衰究竟，不但甩不掉冥婚對象，就連警花林子晴 (王淨 飾) 埋線已久的緝毒案，都被他搞砸。為了挽回政治危機，恐同又怕鬼的明翰，別無選擇，即使人鬼殊途也要和鬼老公毛毛聯手跨界追凶，一場荒謬絕倫、笑中帶淚的旅途就此展開！