In the spring of 1947 Alice Chamberlain, 27-year-old daughter of Roger Chamberlain, (Lord Weathersley), returns from France, to London. Her old boss, Colonel Legge (aka 'Leggy') now semiretired, asks her to research a mysterious painting of an angel that he has recently acquired. She agrees, and after some basic detective work she discovers that it is one of a group of seven paintings that are also coveted by a group of black occultists. Whoever captures the seven angels will have access to enormous power. To reunite the Angels, Alice has to use all her ingenuity and courage, entering the worlds of high society and occultism, and facing every new situation with common sense and bravery.