After years travelling through Europe with her diplomatic father, Sophia Stanton-Lacy is sent to stay with her London relatives. She finds the household constrained by debt, unsuitable engagements and the rigid authority of her cousin Charles Rivenhall, who expects Sophy to behave like a conventional young woman.
Sophy instead begins reorganising the family’s affairs, challenging a moneylender, discouraging a foolish romance and questioning Charles’s own engagement. Her practical interference creates chaos, but it also exposes the difference between social correctness and genuine judgement.