The crew lock on to an unidentified craft containing the ultimate genetic engineering technology - a machine that can transform any living thing into any other living thing, by re-writing its DNA. A blessing or a curse? Then Lister's curry finds its way into the transmogrifier and assumes near-human form.

Holly regains her genius level IQ and for reasons best known to herself powers down the ship, leaving the crew drifting helplessly towards a White Hole. Will Rimmer sacrifice his hologramatic life to save the rest of the crew?