To escape from the volcanic eruption on Dulkis, the Second Doctor uses an emergency unit. It moves the TARDIS out of normal time and space. The travellers find themselves in an endless void where they are menaced by white robots. Having regained the safety of the TARDIS, they believe they have escaped — until the ship explodes. They find themselves in a land of fiction, where they are hunted by life-size clockwork soldiers and encounter characters like Rapunzel, the Karkus, and Swift's Lemuel Gulliver.

这次，阴谋家贝洛福（特利·萨瓦拉斯 Telly Savalas 饰）在瑞士山区建立一个疗养院，表面上这是一个普通的高级疗养院，风景秀丽、服务一流，但实际上却是贝洛福进行的一项旨在控制全球的计划的重要基地。在这个疗养院里，贝洛福开发出一种新型病毒，他企图将病毒注射到来这里疗养的女患者身上，然后通过她们传播到世界各地，达到掌握世界主权的目的。贝洛福的阴谋行动引起了英国情报部门的注意，于是007（乔治·拉扎贝 George Lazenby 饰）奉命出动。邦德乔装打扮成家谱学的专家混进了这座疗养院，他必须及时查处贝洛福的阴谋，并阻止他！

The TARDIS materialises in a hostile jungle on the planet Spiridon. Jo sets out alone to find help for the Doctor, who has fallen into a coma. She meets a party of Thals and is left in hiding aboard their crashed spaceship while they go to the Doctor's aid. The Time Lord, now recovered, learns of their mission to destroy a party of Daleks sent here to discover the native Spiridons' secret of invisibility.
Another Thal spaceship crash-lands in the jungle, and the survivors bring news that somewhere on Spiridon there is an army of ten thousand Daleks. Jo meanwhile meets a friendly Spiridon named Wester, who cures a deadly fungus disease that she has contracted.
It transpires that the Daleks' army is frozen in suspended animation in a cavern below their base. The Doctor, with the help of the Thals, explodes a bomb in the cavern wall and thereby causes one of the planet's natural ice volcanoes to erupt, entombing the army in a torrent of liquid ice.
The newly-arrived Dalek Supreme and his aides are left stranded on Spiridon as the Thals steal their ship and the Doctor and Jo depart in the TARDIS.