Doctor Who fan fiction.
Two interlaced stories. In the first, the Doctor (either the Fifth or the Sixth Doctor) and his companion Peri find a dying man on a snowbound world, only to realise that the situation is a trap constructed by the Doctor's enemy, the Master. Interspersed with this story are scenes from the Master's manipulation and torture of inhabitants of an unspecified world, whom he keeps in thrall as servants.
The Master's behaviour in this story is sadistic even by his standards, including, at one point, hypnotising a man into cooking and serving his own child as a meal for the Master and his guests.