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.

Izzy is in the Caribbean on the honeymoon-that-isn't after her fiancé broke her heart. She's not looking for someone new. But when she meets Charles Miller, a successful writer holidaying alone, the electricity is undeniable. And what does she have to lose? In Ireland, Charles's ex-wife and agent Ariel flits from party to party, glamorous and poised. She's always in touch with Charles. Though they're divorced, they're very close. Ariel wonders if they should get back together. She's an independent woman, but she liked being part of a power couple.

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.

It's set to be the perfect wedding - till the chauffeur is asked to keep driving the bride round the church. This wedding is not going as planned. Lottie is a guest at the wedding when she sees Max for the first time in fifteen years. No kiss since has matched their last kiss together. They were on the brink of a beautiful love story. Then something shocking happened that tore them apart. Now here he is, handsome as ever, teasing Lottie in the old way - and that tingling electric attraction is back. But Max is out of bounds.

Life in Dublin hasn't worked out quite as planned for friends Melissa, Steph and Eilis. Melissa has a successful career, but she's a mess of insecurities. Steph is lonely, walking on eggshells around her philandering husband and angry teenage daughter. And Eilis, an A&E doctor, is just going through the motions with her long-term partner, Rob. Is it ever too late to take charge and live your life on your terms?