生前是过气女歌星的女鬼徐半香（张曼玉），算准某名将要临盆的孕妇会于某间医院生产，准备投胎重新做人，不想，该孕妇被摇身变作某所高中教师的开心鬼（黄百鸣）送错医院，徐半香错过投胎时机。为泄心头之恨，徐半香开始想方设法捉弄开心鬼，最甚一次，她附身开心鬼班里女班长（袁洁莹），令她跑到夜总会稀里糊涂地大闹了一场，结果在该家夜总会寻欢作乐的一群流氓被抓，开心鬼受到无辜牵连，徐半香又得意又担忧之时，开心鬼却用爱来感化她，眼看皆大欢喜，出狱后的流氓不请自来。

电影讲述了外星共生体“毒液”与宿主埃迪（汤姆·哈迪 饰）这对“最佳拍档”遇上致命反派共生体“卡内奇”（伍迪·哈里森 饰），超级英雄和邪恶反派的宿命之战即将开始。

Adam is a teenage artist coming of age in the aftermath of an alien takeover. The Vuvv, a species of hyper-intelligent extraterrestrials, brought wondrous technology to earth, but only the wealthiest can afford it. The rest of humanity, their livelihoods now obsolete, have to scrape together money in the tourism industry. In the case of Adam and his budding love interest Chloe, that means livestreaming their courtship for the amusement of the coffee-table sized Vuvv, who find human love exotic and interesting. When Adam and Chloe's scheme goes sideways, Adam and his mother have to find their way out of an increasingly nightmarish alien bureaucracy.Writer-director Cory Finley (Thoroughbreds, 2017 Sundance Film Festival) returns to Park City with this brazenly original sci-fi trip that features a breakout performance by Asante Blackk. Based on the novel by National Book Award winner M.T. Anderson, the film carefully threads its comedic fantasies with a morose sensibility that sends audiences on a probing exploration of class and commerce.源自：

故事围绕一名前UFC拳手（杰克·吉伦哈尔饰）展开，他在佛罗里达礁岛群一家满是牛鬼蛇神的酒吧担任保镖工作，但他很快发现，一切并非都像这个热带天堂一样美好。