After their father disappeared in the war, Sorrell, Holly, and Mark Forbes were sent to live with their grandfather. When he dies, the three orphans are on the move again—this time to London, where their maternal grandmother is a well-known actress. The city is a strange, bustling place that frightens young Holly, but the siblings' new home at 14 Ponsonby Square has a garden that instantly enchants them. Their grandmother enrols them at the Children's Academy of Dancing and Stage Training, where they'll carry on the tradition of their famous theatre family, which includes cousins they never knew they had. Stuck-up Miranda thinks she can act better than Sorrel; homesick Mark discovers he can sing; and Holly is a natural dancer. Will Sorrel, Holly, and Mark live up to their family legacy?