The novel's plot concerns, among other things, the effects of a black woman and her niece moving into a spa resort inhabited by wealthy centenarians. The ironic novel is about eroticism and exoticism in the milieu of quaint but lewd old British ladies at the fictional spa. The novel is noted for its florid and baroque style and parody-like humour, and its sexual innuendos both heterosexual and homosexual. There is also a fanciful brand of Catholicism, a blend of mortification of the flesh, high-flown mysticism, and proselytism.