A couple on the verge of a nasty divorce attempt to sell their empty love nest and move on with their lives, separately. After a successful open house they are horrified to discover, days later, that a potential buyer didn't leave their home. While Alice is being held captive in the basement, the unannounced house guest moves in upstairs. She senses her capture is being kept a rebellious secret. She knows her way only way out if she can only get out alive.

　　一對夫婦入住了一家度假酒店,幾個小時后,他們的女兒失蹤了.隨著尋找他們女兒的時間的推移,越來越多的真相與謎題出現.....

　　直播主瑪菲司一家抵達即將開幕的度假村舉辦活動，然而他們從未料到，迎接他們的竟是恐怖的降臨。為了揭開真相，阿序和好友天仁召集了一群網友，再次前往度假村探險，并希望通過這次探險在網絡上獲取流量。殊不知，他們即將卷入一場自1960年延續至今、從未停止過的邪惡祭典。

　　British Army radiation drills at a remote Scottish base attract a subterranean, radioactive entity of unknown nature that vanishes, leaving two severely radiation-burned soldiers... and a "bottomless" crack in the earth. Others who meet the thing in the night suffer likewise, and with increasing severity; it seems to be able to "absorb" radiation from any source, growing bigger and bigger. What is it?? How do you destroy a thing that "feeds" on energy?