艾莉深陷一种可怕的病症：她的记忆会周期性清零，连丈夫和女儿都无从辨认。每一次重启都让她坠入迷雾，只留下对陌生生活的零星片段，似曾相识，却无从拼凑。。。
街景地图PD秀仁带领团队，前往传闻诡异的杀木池水库补拍路段画面——此前素材中莫名出现了无法解释的人形。团队必须在当天完成重拍，可踏入水库区域后，怪事接连发生：镜头捕捉到无人的身影，失踪的前辈突然现身，水下传来若有似无的低语。夜幕降临，信号逐渐消失，成员们接连遭遇离奇状况，黑暗的水库深处，似乎有什么东西正循着水声，向他们缓缓靠近。
影片讲述麦克在儿子万圣节游行失踪一年后，与分居妻子共同追查线索，发现每年万圣节浮现的复仇之灵会绑架儿童，必须在有限时间内解救儿子以免其永困幽灵世界。
“Lobo Feroz is a loose, revitalised adaptation of Big Bad Wolves. There were many changes that we made when you compare it to the original, given that we added new characters, plot strands and locations, and we introduced and fleshed out new themes teetering between dark comedy and police thriller. The film questions one’s principles, human behaviour and how ambiguous it can be,” the director explained to Cineuropa. “I’m very happy to be able to work with a dream Spanish cast, where everyone demonstrates their enormous talent and commitment in every scene and through every single detail.” The screenplay for the movie – written by Juan Manuel Foode Roma and Eva María Alonso Moreno – follows a police officer on the fringes of the law and a woman seeking revenge. Their paths cross, as they are obsessed with discovering the identity of the murderer behind a string of brutal crimes involving various girls. They are both willing to do whatever it takes to secure a confession, even though they will have to take the law into their own hands in order to do so. At the same time, a model detective will do his utmost to avoid irreparable errors being made and to ensure that this desperate search for the truth does not transform into the fiercest of wolves.
