本剧改编自同名小说。　　米德威奇，一个上班族居住的英格兰小镇，自由开明、渴求进步，由各种小家庭和富人街组成。这里没有太多的事情发生，其中也有着充分的理由。　　直到夏日某一天的黄昏时分，小镇一个宁静的区域陷入了恐慌。人们毫无预兆、毫无理由地晕倒，任何试图进入该区域的人也会遭遇同样的情况。　　没有人明白这是为什么。当神秘的停电解除后，被这次事件影响的人们逐渐回归正常生活，除了该区域内的每一位育龄女性突然莫名其妙怀孕了。　　随着消息传开，局面越来越紧张，经历了这种情感震荡的人们需要帮助，而天才心理治疗师Susannah Zellaby医生担起了这个责任。Susannah的女儿Cassie已经怀孕，她对于这一现象背后的黑手深感担忧。　　当地警官高级督察Paul Kirby负责维持秩序，但人们不知道的是，一股骇人力量正在小镇那些安逸的街道上集结。这些孩子，可能是潜在的寄生虫，在家人关爱下茁壮成长。这些孩子是谁？他们想要什么？

Shipton Abbott continues to keep DI Humphrey Goodman and his team busy, with a baffling new crime each episode. From a death on a steam train to a missing teacher, the team have their work cut out. Even more so with Police HQ’s threat of the local station house closure hanging over them – the pressure is on to get results.　　Meanwhile, Humphrey and Martha’s journey to find their own version of a family continues as they explore the possibility of fostering. Martha’s mother Anne throws herself into the world of online dating, and a well-meant gesture from Esther’s daughter Zoe threatens to uncover a long-held secret…