Everyone tells Martha Friel she is clever and beautiful, a brilliant writer who has been loved every day of her adult life by one man, her husband Patrick. So why is everything broken? Why is Martha - on the edge of 40 - friendless, practically jobless and so often sad? And why did Patrick decide to leave? Maybe she is just too sensitive, someone who finds it harder to be alive than most people. Or maybe - as she has long believed - there is something wrong with her. 

To Nicole and Jamie Maguire, their parents seem the ideal couple - a suburban double act, happily married for more than 30 years. So when Linda and Gerry announce that they've decided to separate, the news sends shockwaves through the siblings' lives, forcing them to confront their own expectations and desires. 

Chemist Elizabeth Zott is not your average woman. In fact, Elizabeth Zott would be the first to point out that there is no such thing. But it's the early 1960s and her all-male team at Hastings Research Institute take a very unscientific view of equality. Except for one: Calvin Evans; the lonely, brilliant Nobel-prize-nominated grudge-holder who falls in love with—of all things—her mind. True chemistry results.

Journalist and single mother Suzy Hamilton gets a phone call one summer morning and finds out that the subject of one of her investigative exposés, wellness blogger Tracey Doran, has killed herself overnight. Suzy is horrified by this news but copes in the only way she knows how - through work, mothering and carrying on with several ill-advised affairs. The consequences of her actions catch up with Suzy over the course of a summer and she starts receiving anonymous vindictive letters.

One by one, she undid each event, each decision, each choice. If Davy had remembered to put on a coat. If Seamie McGeown had not found himself alone on a dark street. If Michael Agnew had not walked through the door of the pub on a quiet night in February in his white shirt. There is nothing special about the day Cushla meets Michael, a married man from Belfast, in the pub owned by her family. But here, love is never far from violence, and this encounter will change both of their lives forever.

Abigail Jex never expected to see any of the Radleys again. They were extraordinary, captivating creatures transplanted from a bohemian corner of North London to outer suburbia, and the young Abigail found herself drawn into their magic circle: the eccentric Frances, her new best friend; Frances' mother, the liberated, headstrong Lexi; and of course the brilliant, beautiful Rad. Abigail thought she'd banished the ghost of her life with them and the catastrophe that ended it, but 13 years later a chance encounter forces her to acknowledge that the spell is far from broken.

Susan and Norma have been best friends for years, at first thrust together by force of circumstance (a job at The Pin Cushion, a haberdashery shop in 1990s Leicestershire) and then by force of character (neither being particularly inclined to make friends with anyone else). But now, 30 years later, faced with a husband seeking immortality and Norma out of reach on a wave of professional glory, Susan begins to wonder whether she has made the right choices about life, love, work and, most importantly, friendship.

On an island off the west coast of Ireland, the Moone family gather, only to be shattered by tragedy. Murtagh Moone is a potter and devoted husband to Maeve, an actor struggling with her most challenging role yet as mother to their four children. Now Murtagh must hold his family close as we bear witness to their story before that night.

Back in the long ago '90s, Rachel Walsh was a mess. But a spell in rehab transformed everything. Life became very good, very quickly. These days, Rachel has love, family, a great job as an addiction counsellor, she even gardens. Her only bad habit is a fondness for expensive trainers. But with the sudden reappearance of a man she'd once loved, her life wobbles. She'd thought she was settled. Fixed forever. Is she about to discover that no matter what our age everything can change? Is it time to think again, Rachel?

Nick: failed writer. Failed husband. Dog owner. Bee: serial dater. Dress maker. Pringles enthusiast. When fate brings them together over a misdirected email, the connection is instant. They feel like they’ve known each other all their lives.

For Samantha Miller's young fans—her 'girls'—she's everything they want to be. She's an oracle, telling them how to live their lives, how to be happy, how to find and honour their 'truth'. And her career is booming: she's just hit three million followers, her new book Chaste has gone straight to the top of the best-seller lists and she's appearing at sell-out events. Determined to speak her truth and bare all to her adoring fans, she's written an essay about her sexual awakening as a teenager, with her female best friend, Lisa.

Frida Liu is a struggling mother. She remembers taking Harriet from her cot and changing her nappy. She remembers giving her a morning bottle. They'd been up since four a.m. Frida just had to finish the article in front of her. But she'd left a file on her desk at work. What would happen if she retrieved it and came back in an hour? She was so sure it would be okay. Now, the state has decided that Frida is not fit to care for her daughter. That she must be re-trained. Soon, mothers everywhere will be re-educated. Will their mistakes cost them everything?

Molly lives a quiet, contained life in London. Naturally risk averse, she gains comfort from security and structure. Every day the same. Her identical twin, Katie, is her exact opposite: gregarious and spontaneous. They used to be inseparable, until Katie moved to New York a year ago. Molly still speaks to her daily without fail. But when Molly learns that Katie has died suddenly in New York, she is thrown into unfamiliar territory. Katie is part of her DNA. As terrifying as it is, she must go there and find out what happened.

The inhabitants of the Inventor's Housing Estate keep themselves to themselves. There are the friendly 'Hellos' when commutes coincide and the odd cheeky eye roll when the wine bottles clank in number seven's wheelie bin, but it's not exactly Ramsay Street. The dilapidated community centre is no longer the beating heart of the estate that Becky remembers from her childhood. So the new pottery class she's helped set up feels like a fresh start. And not just for her.

On a perfect August morning, Elle Bishop heads out for a swim in the pond below 'The Paper Palace'—her family's holiday home in Cape Cod. As she dives beneath the water she relives the passionate encounter she had the night before, against the side of the house that knows all her darkest secrets, while her husband and mother chatted to their guests inside.... So begins a story that unfolds over 24 hours and 50 years, as Elle's shocking betrayal leads her to a life-changing decision—and an ending you won't be able to stop thinking about.