Carly Cooper is 30, single and after coming close to saying ‘I do’ to six different men, she’s wondering if she accidentally said ‘goodbye' to Mr Right. But there is a problem. Her ex-boyfriends are scattered all over the world and Carly lives in 1999: an era before Facebook, Google, smartphones, 4G and Broadband, when it was impossible to track people down with a few clicks of a mouse. On a mission to discover if she walked away from her 'happy ever after', Carly quits her job, her flat, her whole life and sets off on a quest to track down all the men she has ever loved.

Suze has a niggling feeling that her husband Karl's marital sat-nav has taken a wrong turn and led him down the road to temptation. What's a suspicious wife to do? Mel knows that her sweet, docile husband Joe would never, ever cheat. But when Suze, her sister-in-law, hires a honeytrap to test Karl, the results blow Mel's world apart. Mel, Joe, Suze, Karl. They're family. They're friends. And they're about to discover whether or not they can navigate those other f-words - fidelity and forgiveness.

On Christmas Eve, 1968, Cathy McLean receives a surprise visit from the lost love of her life and is forced to choose between the one that got away and the one that stayed. On Christmas Eve, 1993, Cathy’s daughter Helena is overjoyed to hear that her boyfriend is about to propose, until a devastating encounter threatens to bring her heartbreak instead of diamonds. On Christmas Eve 2023, a shocking discovery rocks Eve Quinn’s world. The only gift Eve wants this year is the truth. But will it take a Christmas miracle to unravel generations of secrets?

Colm O’Flynn was loved by his close circle of family and friends, however his death came too soon for everyone to make peace with their past. Shauna, his second wife, adored him. But one night she broke their marriage vows and didn’t get time to ask Colm’s forgiveness. Jess was the first Mrs O’Flynn. Her heart is set on someone new, but will the last one-night stand she shared with Colm come back to haunt her? Colm’s best friend, Dan, is recently divorced. Can he take a second shot at happiness if it means betraying the one person who always had his back?

This is... Denise. Married to Ray, her first and only love, Denise has never, for one moment, regretted putting the husband she idolised on a pedestal above everyone and everything else. But, after forty years of marriage, he is gone, leaving Denise to discover that their perfect marriage was fatally flawed. Now she faces a future alone. But first, she must face the betrayals of the past. This is... Claire. The estranged daughter of Denise, the woman who put her husband before her children, Claire took the opposite path and devoted her life to raising her family, sacrificing.

Thirty-year-old Dee and her husband Luke are blissfully happy. Every day she makes her loyal parents incredibly proud. Jen has been her best friend since their days of teenage crushes, bad '90s makeup and huge hair. They are just like any other group of family and friends - living life and getting by. Until one day everything changes. Dee is gone, killed by a reckless driver, leaving the people she loved to deal with their grief in different ways. A marriage is rocked as a parent seeks justice. A husband struggles to accept the loss of his wife.

Their rise was meteoric. Only a few years before, they had been three friends from Glasgow, trying to survive in a world of danger and dysfunction. Suddenly they were thrust on to the world’s biggest stage, accepting an Oscar in front of the watching world. That night was the beginning of their careers. But it was the end of their friendships. For two decades they didn’t speak, driven apart by a horrific secret. Until now... Their past is coming back to bite them, and they have to decide whether to run, hide, or fight.

On a cold December morning... Caro sets off to find the truth: has her relationship with her father been based on a lifetime of lies? Cammy can't wait to surprise the woman he loves with a proposal. All he needs is the perfect ring. Lila can no longer hide her secret. She has to tell her lover's wife about their affair. After thirty years, Bernadette knows it's time. She's ready to leave her controlling husband... and never look back.

After escaping her controlling husband, Bernadette Manson is taking the first extravagant holiday of her new life. But when her best friend cancels, will she be strong enough to fly solo? Tadgh Donovan is about to jet off to his destination wedding when he sees a shocking text. Has his bride-to-be written her wedding vows… or already broken them? Hayley Ford is the wife of a top fertility specialist yet her battle to get pregnant has almost broken her marriage. Can a trip to the sun heal their relationship or should she brace for a crash landing?

When Tess married Drew Gold, she knew his two ex-wives were still in his life. Now Drew has planned a luxury cruise to celebrate his birthday, and all the former Mrs. Golds are coming too...Drew’s second wife, fashion editor Mona, never puts a Louboutin wrong when it comes to style. Now it's time to reclaim the only man she ever really loved...if she can tempt Drew away from Sarah Gold, his new wife for a second time. When Drew left his first wife, Sarah, for the glamorous Mona, Sarah's emotions went into hibernation. Now she's decided to shave those legs and start living again....

Laney Cochrane loves her life. With her friends Millie and Tash, she runs a proposal agency, organising the perfect setting for their clients to pop the question. Finding that forever love is something Laney knows all about. Her marriage to Cameron is blissfully content, and she has never doubted they’ll live happily ever after. Then Cara Deacon walks into their office. When Cara enlists their help to set up a romantic engagement to her boyfriend, they visualise a breathtaking scene under a moonlit Manhattan sky.

Tress Walker waved her perfect husband Max off to work, with no idea that she was about to go into labour with their first child. And completely unaware that when she tried to track Max down, he wouldn’t be where he was supposed to be. At the same time, Max’s best friend Noah Clark said goodbye to his wife, Anya, blissfully oblivious that he would soon discover the woman he adored had been lying to him for years. And living alongside the two couples, their recently widowed friend, Nancy Jenkins, is getting ready to meet Eddie, her first true love at a school reunion.

You know that ‘till death do us part’ bit in the wedding vows? Well Zoe Dalton believed it. She walked up the aisle thinking that she was strolling to her happy ever after. One month later, her heart is in pieces, she’s returning the wedding gifts and there’s a husband-shaped space next to her in bed. He’s gone, after Zoe discovered a devastating secret. But Zoe has lost so much more than her marriage. Her three sisters are not only her siblings, they’re her best friends, too. Now she’s discovered that one of them may have been the reason her husband betrayed her.

Adam adores Emily. Emily thinks Adam’s perfect, the man she thought she’d never meet. Emily chose Adam, but she didn’t choose his mother, Pammie. There’s nothing a mother wouldn’t do for her son, and now Emily is about to find out just how far Pammie will go to get what she wants: Emily gone forever.

Susie did something that she knows she will always regret: giving her baby son up for adoption, to keep her infidelity secret from her family. Louise, Susie's daughter, feels the effects of that decision echoing down through the years - her mother has always been difficult, too strict with her but not strict enough with her sister, Grace, who is wild and out of control. And Danny, Susie's husband, adores her but has always sensed something wrong at the heart of their marriage.