The Americans and the Russians each have a two-person base on the moon. The Americans have had to keep replacing their astronaut teams because they quickly go crazy; they have been using only male astronauts on the unspoken assumption that this would avoid any possibility of impropriety. The Russians, as godless Communists, are under no such constraints, and their male-female team has remained well-adjusted. At the start of the film, a male and female American astronaut team is sent up to replace the sex-starved all-male team. The government insists on them being married first to preserve morality. Most of the story revolves around the eventual consummation of this marriage of convenience, and around their relationship with their Russian neighbors, who keep casually dropping by.

In nineteenth century Yorkshire wealthy orphan Anne Lister lives with an aunt and uncle, anxious for her to marry well and blissfully - unaware that she is a lesbian. Anne is recording her thoughts and exploits in a coded diary. When her lover Mariana Belcombe makes a marriage of convenience to rich old Charles Lawton she feels betrayed and, although Mariana visits her,the relationship is going nowhere. Helped by old flame Tib she makes a play for innocent Miss Browne but sees she is barking up the wrong tree and diverts herself by renovating the family hall. A drunken Tib almost exposes her secret and scornful mine-owner Christopher Rawson, whose marriage proposal she rejects, tells her that her sexuality is a subject of local gossip....