Addy & Prue Fairweather live with Nell their widowed mother in a flat above her shop on the Scotland Road. The sisters however are very different. Addy is dark-haired plain & always in trouble whereas Prue is flaxen-haired blue-eyed & as angelic as her looks imply. To make matters worse Nell makes no secret of her preference for the younger girl increasing Addy's jealousy & resentment. On the other side of the coin Giles Frobisher & his twin sister Gillian live in a crumbling mansion near the sea in Devon. The family have lost most of their money in the Depression so Giles leaves university & joins the Fleet Air Arm. He meets the Fairweather girls briefly on a visit to Liverpool but they lose touch. When they meet again Addy & Prue are no longer children & Giles realises he is falling in love...