A convent teacher spreads a little happiness and makes enough money to support her crippled brother's habit by selling her favours regularly on a cross-country night sleeper. She makes sure she is in control of each encounter until one client reaches her more than she expects.

Maureen's biological clock is ticking, and she wants a baby. Her husband George is unable to oblige. When Maureen bumps into Geoff, a former lover from years ago she decides he might be able to supply the wanted seed. But the scientific controls on their weekend encounter soon give way to natural urges and the consummation is concluded with tenderness.

When he discovers the world is about to end, a lovestruck teen makes it his mission to bed the girl he has fallen for.