The Doctor is in trouble. He has his own race to win. Stuck in a parallel dimension, pursuing the mysterious Sabbath, he must unravel a complex plot in which he himself may be a pawn. Following the only lead, the TARDIS arrives on Selonart -- a planet famed for the unique, friction-nullifying light water that covers its surface. A water that propels vast, technological yachts across its waves at inconceivable speeds. All in all, an indulgent, boastful demonstration of power by Earth's ruthless multi-stellar corporations. Is Sabbath's goal to win the race? Who is Bloom, the enigmatic Selonart native? As the danger escalates, the Doctor realises that he is being manoeuvred into engineering his own downfall. Is it already too late for him?