《寻魔神探之换脸惊情》是由杨智谦（中国香港）执导，米粒,王彤,孙玮伦,石羽嫣主演的剧情片。该电影于2017年在大陆上映。天狗误闯人界，附身快递员郭铭，对抗魔头，保护人类。在上集中，他和警花齐燕联手挫败毒魔、色魔女假借左海涛之手，杀害贾依依的试衣间诡案，消灭毒魔，赶走色魔女。魔王得知之后震怒，派出霹雳魔与色魔女再度来到人界，要对郭铭展开毁灭性的报复。富商王思哲在女朋友张曼妮家开PARTY，找来张曼妮的一班同事好友吴丹、陈栋、林洁等人。酒后，吴丹色诱王思哲，与她发生关系，被张曼妮发现，张曼妮盛怒之下，当场给了吴丹一个耳光，把众人都赶出别墅。郭铭感应到魔头的气息，却误入圈套，被霹雳魔和色魔女联手打败，封印神力。等他再次醒来时，已经身在张曼妮的别墅当中，吴丹就死在他身旁的浴缸里。张曼妮回家时发现，郭铭成为唯一的嫌犯，被迫逃亡。警察局里，齐燕在调查过程中，先后排除了当晚在场众人的嫌疑，却从陈栋、林如云口中得知吴丹与张曼妮、王思哲之间的三角关系，同时从张曼妮乖张的行为举止中发现疑点，可是都无法证实她与吴丹被害有关。就在这时，她得知郭铭是唯一嫌犯，而同时郭铭还在与她微信联系，想从她这里探出口风，决定将计就计，布下圈套诱捕郭铭……
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