A group of college friends on the verge of summer graduation wonder about what the future holds; marriage and motherhood; world domination; or a better life elsewhere? One thing they do know is that they'll always be friends. But before life takes them in different directions, they make a pact to reunite in five years to see how their predictions turned out.

Romy Moore has always cherished the warm embrace of her family home in the foothills of the Dublin Mountains - a welcome escape from life on the lower rungs of the London career ladder. It is her mother Cathy’s encouragement that has kept Romy chasing her dreams, so when she loses her, Romy feels more adrift than ever.

Thirty-year-old Sophie has longed to live in Manhattan but could never afford to do so—even with roommates. She has just been laid off from a job that she didn't love. When her 92 year-old great aunt invites her to stay with her for a while—in her Fifth Avenue Apartment, Sophie jumps at the chance to move to the city. She decides to temp for a while to find out what industry she wants to go to next as she is burned out from the stress of working at a law firm.

Heather Willette has a good life in Concord, Massachusetts—complete with a husband who runs his own business and a son to take up his mantle one day. But now that her marriage has fizzled out and Ross, her only child, is graduating from college and getting serious with his girlfriend, Heather wonders if that life is the one she really wants. Ready to seek out her own happiness and discover herself again, Heather decides to leave her husband and rent a cottage on Nantucket.

An accidental trophy wife must survive the deepest depths of high society. Meet Amy, the world's most improbable trophy wife. She has a degree, ambitions, and something resembling a mind of her own. The trouble is, she just doesn't use it anymore. Married to handsome aristocrat, Harry Green, Amy's world is a whirlwind of luxury, labels, and lunches. But amidst the peerages and polo of the privileged, few lie wolves in minks' clothing. Before she knows it, Amy's perfect existence is plunged into chaos by the poshest of plots.

Ten years ago, Keaton Young turned his back briefly on his four-year-old daughter, Vivian, during a family picnic at the beach. Minutes later, she was gone, her floaties found in the ocean. Drowned. But they never found a body. And Keaton has never given up hope that, somehow, she’s still alive.

Twenty-six years after that amazing summer, Ariel, Sheila, Wyatt, and Nick reunite at the hotel where they first met. Now it’s called The Lighthouse and Nick owns the entire operation with his wife and daughter. Ariel and Wyatt, married for decades, arrive with their son, and Sheila’s back too, with her daughter by her side. Life hasn’t exactly worked out the way they had all hoped.

When the unthinkable happens, and Claire Thompson's husband dies suddenly, she's left wondering how to go on. Being a wife and mother is all she's ever known. Grieving and lost, she decides to take her family for one last trip to their beach house before she's forced to put it up for sale. The house is filled with happy memories, and it seems like a great way to remember Bryan.

Two days ago, the Wilson family checked into the imposing, glass-fronted Lodge, surrounded by snow and perched perilously on the edge of a cliff looking out to a gray sea. Not everyone was looking forward to the family get-together. But mother-in-law Angela insisted the winter trip would help heal their rifts....

My hand trembles as I stare at the anonymous text. On this sunny Saturday morning, our twin ten-year-old boys were playing in the park just down our tree-lined street. But only one of them has come home… and it’s all my husband’s fault. I race to Leo’s study and demand answers. As his face turns white, I know: one of his affairs has turned deadly. I always smell the unfamiliar perfume on his shirt. I try to pretend we are a happy family, for the sake of the children… but now, my child is in terrible danger.

Katelyn smiles around at her husband and friends, gathered to celebrate her 36th birthday in their beautiful home decorated with fairy lights. But the next day Katelyn wakes up shaken and terrified in a hospital bed. She doesn’t remember the sweet taste of birthday cake icing, or how angry her best friend was at midnight, or the terrible things her husband said. She doesn’t remember the party at all. When she asks her husband what happened the night of the party he says "nothing". But her blood runs cold at the way his voice lilts slightly. The way it always does when he is lying.

Ethan gently squeezes my hand as he slides the golden ring onto my finger. But I know we aren’t worthy of happiness. As I look down at my wedding ring, in a blistering flash, I suddenly remember another piece of that pitch-black, rainy night… but I try to focus on Ethan’s gorgeous blue eyes. I know exactly what he’s thinking. We can never tell. All our family, friends and loved ones smile as they watch Ethan and I promise to be together until death us do part. But only we know what that really means…Because we have already killed someone.

Interior designer Nicky always used to know how to make the best of things. Ever since she lost her husband though, things haven’t been easy. She’s had to raise her two daughters alone and she’s so proud to see them all grown up, and she knows that’s down to her. But she can’t help but feel like she doesn’t know what to do with her life now. Then her best friend begs her to help out. Jenny is a TV exec and her new renovation show is in peril. Only Nicky can help. The catch – Nicky needs to fly to Provence… tomorrow.

‘She’s dead, Emily. She’s dead.’ The phone falls from my hand. I feel like I’ve been punched in the stomach. This isn’t possible – my mother couldn’t have been in an accident at the cliffs. She cannot be dead. Because if she is, then it might be all my fault… This first trip back home was supposed to be a fresh start for our family. Full of cocktails on the terrace and sunny days at the beach. It was time to forget all the secrets that had torn us apart.

One year ago today, Tress Walker’s husband was killed in a car accident, on a trip with his secret mistress whilst Tress gave birth to their son. But as time moves on, Tress has to choose whether to protect her fragile heart or open it to love again.

Noah Clark was equally devastated to discover his wife and his best friend were having an affair. Now the love of his life is asking for a second chance. But can there ever be a way back once the trust is broken?