An English bon-vivant osteopath is enchanted with a young exotic dancer and invites her to live with him. He serves as friend and mentor, and through his contacts and parties she and her friend meet and date members of the Conservative Party. Eventually a scandal occurs when her affair with the Minister of War goes public, threatening their lifestyles and their freedom.

The closeness of three girlfriends is shattered when Pat takes a sudden shine to a boy she knew, now back on leave from the army.

The TARDIS lands on the idyllic jungle world of Deva Loka, which is being surveyed for possible Earth colonisation. Deva Loka is already home to a race of apparent savages, however: a mysterious people with strange powers which have mentally unbalanced the members of the expedition. To make matters worse, an ancient enemy of the natives known as the Mara is intent upon revenge, and latches onto Tegan's mind as its bridgehead to victory.

Young Col is not enjoying his Cornish holiday and wishes his father would not join the family. Events make him grow up rather fast.

Robert Louis Stevenson's supernatural chiller is updated to present day Edinburgh.