Young, gay, William Beckwith spends his time, and his trust fund, idly cruising London for erotic encounters. When he saves the life of an elderly man in a public convenience an unlikely job opportunity presents itself - the man, Lord Nantwich, is seeking a biographer.

Tells the story of M Francisco Fabrigas, explorer, philosopher, heretical physicist, who took a shipful of children on a frightening voyage to the next dimension, assisted by a teenaged Captain, a brave deaf boy, a cunning blind girl, and a sultry botanist, all the while pursued by the Pope of the universe and a well-dressed mesmerist.