A Dalek fleet surrounds a lone rebel ship, and only the Doctor can help them now.

The Doctor faces his greatest enemy and he needs Clara by his side. Confronted with a decision that could change the Daleks forever he is forced to examine his conscience. Will he find the answer to his question - "Am I a good man?"

In the mysterious world of the Nethersphere, plans have been drawn. Old friends and old enemies manoeuvre around The Doctor, and an impossible choice is looming over him.