该剧是BBC播出的一部医学恐怖剧(medical horror genre,一个有趣但是很新鲜的流派)。 故事开始于一间手术室,气氛很紧张。手术台上躺着一位年长的患者,他的胸腔已被打开,还泛着红光。医生试图从他的胸腔内摘除某个已变异的器官,样子很可怕。医生似乎有点紧张,在他移动手术刀的时候,脸上和额头上布满了汗珠。手术助手们不安地站在一旁,他们知道有什么事情不对劲,但就是说不上来。病人突然睁开眼睛,开始尖叫…… 故事的主人公Hannah(Claire Foy)是一名医学院的学生,母亲意外去世一年后,她来到这家医院实习。外科医生Nick(Stephen Campbell Moore)医术高明,但总给人一种神秘感,似乎隐瞒了一些秘密。在一次手术中,Nick不小心弄伤了自己的手。伤口很快红肿、发炎。而在Nick的胃里,一条看不见的「寄生虫」正在缓慢移动。与...A year earlier medical student Hannah Carter freaked out in the operating theatre when her doctor mother, a cancer patient,died. Now she is back to resume her studies amongst whispers of her instability. Why does the stomach of Charlie Maddox,a man who has had five operations for abdominal cancer,undulate when she feels it? How come the cut on the hand of surgeon Nick Gates,Hannah's ex-boyfriend, never heals and why is Nick secretly injecting Charlie but not recording it on his notes? Hannah decides to investigate,uncovering a secret involving a new wonder drug with potentially lethal results.