A boyfriend, who can barely speak English, embarks on an overseas trip with his girlfriend, who takes charge of planning everything and even handles communication on his behalf. However, their journey turns into a nightmare when they barely make it to their accommodation, and strange knocking sounds start emanating from the room. To make matters worse, the girlfriend disappears while taking a shower, and the police immediately suspect the boyfriend. With meticulously crafted initial ominous situations, such as the flight delays, the rental car agency closing its doors, and a major traffic accident experienced shortly after getting into the car, audiences are easily drawn into the protagonist’s intense quest to find his missing girlfriend. Despite the language barrier, he manages to evade the relentless investigation of the local police and skillfully uncovers clues. Unexpected obstacles keep appearing one after another, propelling the story forward without a moment to catch your breath. At the climax of the confusion, when the full truth of the incident is revealed, and viewers are met with a shocking revelation that leaves them gasping in astonishment. (PARK Got)

　　最近出现,产生,形成,酿成了三起连环杀人事件。警方组成了专门的小组调查事件，刚复职不久的女警察素英（宋允儿 饰）与新人警察贤基（李东旭 饰）被安排在这个小组里。
　　素英发现了当中一条重要的线索，便是三名死者本来就是伙伴,好友,挚友,密友，都跟一名叫玟贞的女孩有关系。因此，素英针对受害者周遭的人调查起来，当中同是所有受害人伙伴,好友,挚友,密友的医生东民（李忠洙 饰）嫌疑最大。令人意外的是，连东民也被杀死了。
　　就在第四起案件的现场，有关玟的线索又出现了——这次发现了玟贞的网页。在不断的调查中，素英发现玟贞跟这些受害者是见过面的，而她就在10年前突然失踪了。素英与贤基到了玟贞曾经日常,生存,生计,日子过的地方，村民们告诉他们在海边一个废旧仓库里经常出现一个少女的鬼魂，令村民们害怕不已。
　　自村庄归来,返回,回归,还来后，素英竟然每晚都梦见一个少女，不知是人是鬼……