American psychologist John Holden arrives in London to participate in a symposium aiming to expose witchcraft and devil-worship as a fraud, with attention centered on a cult run by a Julian Karswell. Debarking his plane, Holden learns that the symposium leader, Henry Harrington, has suddenly died and he is now in charge. What only the audience knows is that Harrington was clearly killed by a demon, apparently summoned by Karswell to avenge his persecution. Despite both threatening and cajoling behavior by Karswell, Holden determines to proceed, though the only cult member willing to talk about his experiences is in a prison psychiatric ward, catatonic after allegedly killing yet another cult member. However, Harrington's niece, Joanna, believes, based on her uncle's notes, that Karswell may indeed have some satanic powers derived from an ancient tome in an obscure language which he has been able to translate, and attempts to warn the skeptic Holden. Karswell's mother also attempts to warn Holden off. However, the thing which begins to most get to Holden are the occasional, but mounting, sensory and mental disturbances he begins experiencing after an encounter with Karswell, and the discovery that, during this encounter, Karswell secretly slipped a slip of parchment with a curse in runic symbols on it into Holden's belongings, a parchment identical to one Harrington recorded having had passed to him in a similar manner shortly before his death... [N.B. Holden at no point stays at the Karswell estate].。该片讲述了双胞胎姐妹如花和如玉一家,由于三峡工程的需要,被政府统一移民安置到东台市学习和生活的故事,爸爸妈妈因为有事要很迟才到东台,奶奶带着如花和如玉先到了东台,但奶奶由于过度思乡出现了精神障碍,如花和如玉决定每天留下一人照顾奶奶,另一人上学。但两人不同的性格让不知内情的小伙伴们诧异不已,于是相约跟踪调查。“心怀鬼胎”、“田边密谋”、“鬼祟跟踪”……行动暴露却穷词诡辩,“三个火枪手”将小孩子的多变习性、淘气可爱演绎得淋漓尽致。。