1951. Brighton. With the war over and the Nazis brought to justice at Nuremberg, Mirabelle Bevan (retired Whitehall secretary) thinks her skills are no longer required. After her lover's death she retires to the seaside to put the past behind her and takes a job at a debt collection agency run by the charismatic Big Ben McGuigan. But when the case of Romana Laszlo - a pregnant Hungarian refugee - comes in, Mirabelle soon discovers that her specialist knowledge is vital. With enthusiastic assistance from insurance clerk Vesta Churchill, they follow a mysterious trail of gold sovereigns and corpses that only they can unravel.

1952, Brighton and London. When seventeen-year-old debutante Rose Bellamy Gore goes missing in a seedy Soho jazz club the prime suspect is black saxophone player, Lindon Claremont, the last person seen talking to her. Under suspicion, Lindon heads straight for Brighton and his childhood friend, Vesta Churchill who works with ex-Whitehall backroom girl Mirabelle Bevan, now in charge of McGuigan & McGuigan debt recovery. When Lindon is taken into custody the two women dive into London's underworld of smoky night clubs, smart cars and lethal cocktails to establish the truth.

1951. Brighton. With the war over and the Nazis brought to justice at Nuremberg, Mirabelle Bevan (retired Whitehall secretary) thinks her skills are no longer required. After her lover's death she retires to the seaside to put the past behind her and takes a job at a debt collection agency run by the charismatic Big Ben McGuigan. But when the case of Romana Laszlo - a pregnant Hungarian refugee - comes in, Mirabelle soon discovers that her specialist knowledge is vital. With enthusiastic assistance from insurance clerk Vesta Churchill, they follow a mysterious trail of gold sovereigns and corpses that only they can unravel.

1952, Brighton and London. When seventeen-year-old debutante Rose Bellamy Gore goes missing in a seedy Soho jazz club the prime suspect is black saxophone player, Lindon Claremont, the last person seen talking to her. Under suspicion, Lindon heads straight for Brighton and his childhood friend, Vesta Churchill who works with ex-Whitehall backroom girl Mirabelle Bevan, now in charge of McGuigan & McGuigan debt recovery. When Lindon is taken into custody the two women dive into London's underworld of smoky night clubs, smart cars and lethal cocktails to establish the truth.