On a planet known only as Chronos, two scientific survey teams have vanished. Inexplicably. Without warning. But with just one clue supplied - a single screamed word: "Cybermen!"
The University they worked for has called in the Earth security forces who despatch a third team, a mix of military and scientific might, under the auspices of a University Administrator. If that kind of volatile grouping isn't bad enough, three strangers have been added to the mix - a young human expert in Cybermen an...