The magic is moving, but Tamar Tamblyn - one of Cornwall’s four teenage Guardians - is stranded at Trezion’s Christmas fair, miles from her fellow Guardians.
Will Arthur, Nick or Gawain reach her before their enemies close in … or will the Ice lady claim her prize?
Who is the mysterious Dr Columbarius?
Why has Tamar been invited to Oakwood Manor?
And since when did time travel mess with molecules – or become quite so dangerous?
This is the story of four teenagers, some ancient knights and a dragon (a very tiny one), pitted against time-defying enemies. Camelot is calling.