Finally, Cath has met someone: a man she loves, Robin, and who adores her in return. And after years of managing fine on her own, running a successful business, raising her son and caring for her elderly mother, she feels she deserves some happiness. She expected everyone to be delighted for her. But her friends and family are suspicious of Robin. And Rebecca, a desperate single mother whom Cath has hired as a live-in housekeeper, doesn’t trust him either. 

The respectable middle-class Twist family is settling in for their usual Sunday lunch. Husband and wife Roger and Becky are there, along with their daughter, Lucy, and her husband, Frank. But then they're joined by an uninvited guest. His name is John, and he knows everything about them—including their darkest secrets. After he manipulates his way into the house, John soon has them bound at their wrists and ankles. But what is the agenda of this twisted stranger? 

There are two little girls in the photo. I instantly recognize myself as the small, dark-haired child in the purple dress. But who is the girl with the long, blonde hair laughing at the camera? And why is the photograph here, in a stranger’s house? When I find the tattered picture hidden away at the back of a dusty cupboard in Amy’s house, my mouth goes dry with shock. Though I haven’t known Amy for very long, I love looking after her young children, in her picture-perfect hilltop house with its sprawling wildflower garden and bright, airy kitchen. 

One night in December, twenty-two year old Ted Green makes his way to Waterloo Bridge determined to end his life. Lonely, despairing and utterly hopeless, it seems the only choice to make. That same night in December, Marianne Cooper is running away from a party. Having found her boyfriend in a passionate clinch with someone else, Marianne can’t get away fast enough. But as she makes her way along London’s South Bank, a figure catches her eye on top of the bridge. Then she sees him, a man ready to jump.

Tamsin recently married renowned composer Robin Featherstone. Robin is much older, but Tamsin doesn’t care—she’s in love. And she knows Robin loves her too, even if he is very close to another young woman—his assistant, Mia. Meanwhile, Robin’s ex-wife and grown children aren’t happy—they’re sure Tamsin is a gold-digger and Mia is an opportunist. Then, when Robin suddenly dies, the family’s worst fears are realized: Tamsin stands to inherit everything. But when the will is read, its contents are beyond shocking.