Dr Keel, treating the victims of a cyclone struck Mexican village, uncovers a number of food-poisonings; emergency cooking oil is, in fact, hydraulic fluid.

Cathy is managing the boxer Joey Frazer, but Pancho Driver's gym, where the man is training, is, Steed suspects, the centre for shipments of illegal ambergris.

Emir Abdulla Akaba is visiting London for his annual medical, and Steed suspects an assassination attempt. Despite Steed assumming the guise of a chef, the Emir seems to have been poisoned while eating a meal.

The disappearance of an albino elephant from Noah Marshall's zoo seems to be linked to Steed's investigation of ivory dust in a gun shop. Steed sets out to rescue Cathy from the tiger's cage, find Snowy and investigate the ivory smugglers.

Why have all the fish vanished from the Scottish coastline? Does it have anything to do with a dead frogman, found stretched as if on a rack? Steed and Emma think so, which is why they're guests of Ian, the 35th Laird of Clan De'ath, and in danger of being caught by the gillies.