Sarah Jane takes Sky and Luke, back from university, to the press conference for the Serf Board, the revolutionary new computer everybody wants but Sky is suspicious of the odd behaviour of its inventor, reclusive Joseph Serf whose DNA according to Mr. Smith is not human. Whilst Sarah Jane interviews Serf in the company of his protective assistant Harrison Sky and Luke explore his office basement where they find small hooded figures working a contraption that controls Serf's every movement. They are not pleased to be interrupted.