To celebrate Lethbridge-Stewart's birthday, a
romantic weekend is planned for him and Sally in a remote cottage in the
Scottish Highlands. Unfortunately for Sally, freak weather causes her
to crash her car.
Lethbridge-Stewart, meanwhile, is in Cairngorm
investigating UFO sightings. Elsewhere, the Daughters of Earth, a
women-only peace movement, are making waves in the political world, but
just who is their enigmatic leader? And what links the Daughters with
the events of Cairngom and Sally's accident?