Dottie and Mary forged a friendship over a bag of penny sweets when they were eight years old. They've shared everything together since then. Now, at seventeen, they're both shopgirls working at Woolworths. As they go out in the world in pursuit of love and happiness and life becomes more complicated, the simplicity of their childhood dissolves. The heady excitement of first love will consume them both, but the pain of unintentional betrayal will test their friendship.

Stella fell in love with Simon hard and fast. He was everything she wanted in a husband, and he seemed to feel the same way about her. More than a decade of marriage later, life is sweet. They have three much-wanted children, a successful business and a comfortable London home. What more could Stella possibly want? But then, out of the blue, Simon is gone. Vanished. No one knows where he’s gone or why. Now Stella, with the help of her friends and family, has to pick up the pieces of her and her children’s life, all the while wondering what she missed.

Palmer Sinclair has never needed anyone’s help. A successful loan officer, she’s all work and no play. But when splitting headaches and blurred vision begin to affect her job, she begrudgingly sees a doctor and receives a diagnosis that leaves her shaken to her core and with little time left. Facing an uncertain future, Palmer makes a bucket list, determined to do the things she’d only dreamed of before she goes.

Husbands Thomas and Matt are enjoying a second-chance marriage after coming out, leaving their wives, and finding happiness in a summer cottage on the southern coast of Maine. They’ve kept a tenuous peace with their exes. Thomas toils in the garden. There is an ease to their love. This is the way life should be. But it’s not long before their three children—each nearing adulthood and fleeing personal crises of their own—descend on their fathers’ bliss. The two-bedroom getaway has just enough space for Thomas and Matt’s future. Now they must make room for the past, and all its drama.

London 1940. As the war rages in Europe, Rose Brown steps on board a ship bound for America, hoping to escape the danger. She's frightened, but her widowed mammy and three sisters in Ireland need the money she earns as nanny to the rich Townsend family. But while Rose plays with baby Sarah in the salty spray on deck, disaster strikes, and the ocean liner begins to sink. In the chaos, Rose and the baby are separated from the family.