"He just changed what it means to be human."
Martha returns home to her family to complete her studies and discovers that her sister, Tish, has been selected to organise
a meeting where a 76-year-old scientist, Dr Lazarus, is developing his age-defying Genetic Manipulation Device.
It soon becomes clear that Dr Lazarus isn't all he seems and, unbeknown to the Doctor, the professor's paymaster has just
set the wheels of a deadly trap in motion.
As human DNA morphs into a monstrous form, can the Doctor and Martha fight for survival?
