Philip Hinchcliffe, acclaimed producer of Doctor Who (1975-77) returns to tell new stories for the Fourth Doctor and Leela. The TARDIS brings the Doctor and Leela to a colony world in the distant future – but they are not the only visitors to this place. The people of this planet are seeing the ghosts of their lost friends and relatives. And the ghosts are stealing people. Trapped in the middle of an escalating conflict, the Doctor and Leela investigate the source of the spirits and find a diabolical machine, a terrible secret... and a foe long since forgotten.