As Norah battles alone, yet again, through the bustling December crowds outside Fortnum & Mason, she hears the first notes of a busker's song that transports her back to the most romantic week of her life. Laughing under an Italian sky, knowing they had to part, Andrew made her a promise: If they are both single on Christmas Eve in 10 years' time, they will meet under the clock on Grafton Street, Dublin. Norah has no idea if Andrew will remember, but she has nothing to lose.

Life is short - no one knows that better than 17-year-old Lenni Petterssen. On the Terminal Ward, the nurses are offering their condolences already, but Lenni still has plenty of living to do. When she meets 83-year-old Margot Macrae, a fellow patient offering new friendship and enviable artistic skills, Lenni's life begins to soar in ways she'd never imagined. As their bond deepens, a world of stories opens up: of wartime love and loss, of misunderstanding and reconciliation, of courage, kindness and joy.

When Emira is apprehended at a supermarket for ‘kidnapping’ the white child she’s actually babysitting, it sets off an explosive chain of events. Her employer Alix, a feminist blogger with the best of intentions, resolves to make things right. But Emira herself is aimless, broke and wary of Alix’s desire to help. When a surprising connection emerges between the two women, it sends them on a crash course that will upend everything they think they know – about themselves, each other and the messy dynamics of privilege.

If it hadn't been for the child then none of this might have happened. She saw me kissing her father. She saw her father kissing me. The fact that a child got mixed up in it all made us feel that it mattered, that there was no going back.

Having dropped out of university, Harmony returns to the site of the urban commune where she lived as a child, now divided into flats. She rents a room in the hope of uncovering the source of her nightmares about a redheaded woman who haunts the house and her obsession with lost objects from her childhood. As the London riots explode in the streets, the two hot summers converge, blurred by the drugs and sex and cheap wine, and Harmony begins to discover what really happened at Longhope 20 years ago. Can she grow up at last and build her own future?

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. 

In her 20s, Emma Blair marries her high school sweetheart, Jesse. They build a life for themselves, far away from the expectations of their parents and the people of their hometown in Massachusetts. They travel the world together, living life to the fullest and seizing every opportunity for adventure. On their first wedding anniversary, Jesse is on a helicopter over the Pacific when it goes missing. Just like that, Jesse is gone forever.

Lily hasn't always had it easy, but that's never stopped her from working hard for the life she wants. She's come a long way from the small town in Maine where she grew up - she graduated from college, moved to Boston, and started her own business. So when she feels a spark with a gorgeous neurosurgeon named Ryle Kincaid, everything in Lily's life suddenly seems almost too good to be true.

Olive is many things. Independent. Adrift. Anxious. Loyal. Kind. Knows her own mind. It’s okay that she’s still figuring it all out, navigating her world without a compass. But life comes with expectations, there are choices to be made, boxes to tick and - sometimes - stereotypes to fulfil. And when her best friends’ lives start to branch away towards marriage and motherhood, leaving the path they’ve always followed together, Olive starts to question her choices - because life according to Olive looks a little bit different.

The Vignes twin sisters will always be identical. But after growing up together in a small, Southern black community and running away at age 16, it's not just the shape of their daily lives that is different as adults, it's everything: their families, their communities, their racial identities. Ten years later, one sister lives with her black daughter in the same Southern town she once tried to escape. The other secretly passes for white and her white husband knows nothing of her past.

Two young people meet at a pub in South East London. Both are Black British, both won scholarships to private schools where they struggled to belong, both are now artists - he a photographer, she a dancer - trying to make their mark in a city that by turns celebrates and rejects them. Tentatively, tenderly, they fall in love. But two people who seem destined to be together can still be torn apart by fear and violence. 

After serving five years in prison for a tragic mistake, Kenna Rowan returns to the town where it all went wrong, hoping to reunite with her four-year-old daughter. But the bridges Kenna burned are proving impossible to rebuild. Everyone in her daughter’s life is determined to shut Kenna out, no matter how hard she works to prove herself. The only person who hasn’t closed the door on her completely is Ledger Ward, a local bar owner and one of the few remaining links to Kenna’s daughter. 

Edie is just trying to survive. She’s messing up in her dead-end admin job in her all-white office, she is sleeping with all the wrong men and she has failed at the only thing that meant anything to her: painting. No one seems to care that she doesn’t really know what she’s doing with her life beyond looking for her next hook-up. And then she meets Eric, a white, middle-aged archivist with a suburban family, including a wife who has sort-of-agreed to an open marriage and an adopted Black daughter who doesn’t have a single person in her life who can show her how to do her hair.

Hannah, Cate and Lissa are young, vibrant and inseparable. Living on the edge of a common in East London, their shared world is ablaze with art and activism, romance and revelry - and the promise of everything to come. They are electric. They are the best of friends. Ten years on, they are not where they hoped to be. Amidst flailing careers and faltering marriages, each hungers for what the others have. And each wrestles with the same question: what does it take to lead a meaningful life? 

Nine lives. Four generations. One family. The MacEntees are no ordinary family. Determined to be different to other people, they have carved out a place for themselves in Irish life by the sheer force of their own personalities. But when a horrifying act of violence befalls television star Alma, a chain of events is set in motion that will leave even the MacEntees struggling to make sense of who they are.