Having grown up on the quiet island of Guernsey, Betty Dean can't wait to start her new life in London. On a mission to find Clara Pickle - the mysterious beneficiary in her grandmother's will - she arrives in grungy, 1990s Soho, ready for whatever life has to throw at her. Or so she thinks... In 1920s bohemian London, Arlette - Betty's grandmother - is starting her new life in a time of post-war change. Beautiful and charismatic, Arlette is soon drawn into the hedonistic world of the Bright Young People. But less than two years later, tragedy strikes and she flees back to Guernsey for the rest of her life. As Betty searches for Clara, she is taken on a journey through Arlette's extraordinary time in London, uncovering a tale of love, loss and heartbreak. Will the secrets of Arlette's past help Betty on her path to happiness?