Jessica and Karl, loving parents to Rhiannon, who after years of trying to add to their family are elated to adopt Gabby, an 8-year-old orphan born with personal challenges. Their ideas of a perfect family come into question when they discover that Gabby is a troubled little girl, and the family begins to believe things aren’t what they seem. As the unsettling behavior of their “child” worsens and lies are uncovered, cracks in the family dynamic form with Jessica becoming increasingly concerned that adopted daughter Gabby is a threat to their family.

1815年，一个性格戏谑的修士汤姆斯艾卡拉，无意间放出两个嗜血女妖到人间，她们的技巧娴熟，只要用指尖一划，就能划破男人的颈项，从中吸取它们的体液。这两个地狱来的女恶魔比吸血鬼更残暴，由于她们的贪欲难以满足，两个杀人不眨眼的女妖，最后连汤姆的兄弟也成了她们的祭品，时间的巨轮也逃不过她们的魔掌。所幸汤姆是神的使者，跟随她们来到21世纪，并且拥有一项秘密武器，得以制服两名女妖， 就看他是否能拿出真本领为人类除害了！