The Millbank medium's escape through her visitor
In 1870s London, Margaret Prior, a grieving, depressed spinster, becomes a lady visitor at Millbank prison and falls in love with Selina Dawes, a medium jailed after a séance in which her patroness died. Selina convinces Margaret they are spiritual 'affinities', shown by gifts that seem to arrive from the spirits and private knowledge no prisoner could have. Margaret secretly gathers money, clothes and passports for them to flee together, but Selina escapes alone with Margaret's maid, Ruth Vigers: her lover and accomplice, who had been reading Margaret's diary and feeding its contents to Selina.
