When the redoubtable Sir Horace Stanton-Lacy is ordered to South America on business, he leaves his only daughter Sophy with his sister in Berkeley Square. But Sophy's cousins are in a sad state, and she's arrived just in time to save them all. When diplomat Sir Horace Stanton-Lacy is ordered to Brazil, he parks his daughter Sophy with his sister's family. Far from the blushing girl they expected, what turns up is a strapping, confident woman, complete with menagerie (horse, greyhound, parrot, and monkey), who sees that her cousins are in a sad tangle. Charles is betrothed to a pedantic blue-stocking almost as tiresome as himself; Cecilia is besotted with a beautiful but feather-brained poet; and Hubert has fallen foul of a money-lender. It looks like the Grand Sophy has arrived just in time to sort them all out!