Ruth Ellis lives with her ten-year old son Andy next to a night club. One night she meets David Blakely, and they start a love affair. However, for David with his upper-class background, it is impossible to uphold the relationship. He breaks up with her, something which makes Ellis, obsessed by him, very upset.
Times are hard for habitual guest of Her Majesty Norman Stanley Fletcher. The new prison officer, Beale, makes MacKay look soft and what's more, an escape plan is hatching from the cell of prison godfather Grouty and Fletcher wants no part of it.
Searching for the third segment to the Key to Time brings the Doctor and Romana to present-day Earth, where the travellers have to contend with stone circles, Druidic rituals and a not-so-mythical goddess known as the Cailleach.
