 Susan Trinder (Sally Hawkins) has been brought up in a house of thieves in London. She gets sucked into a plot by a family friend. She becomes Maud Lilly s (Elain Cassidy) maid so as to get her to marry Mr Richard Rivers. They plan to put Maud in a mental asylum once she marries so they can claim access to her $40,000. The plan becomes a nuisance when Susan mistakenly falls in love with Maud.