Penelope and Chase make a lovely couple, and everyone is excited about their wedding. Except their mothers. The Mother of the Bride, suave Greek-born Alexa Diamandis, doesn’t understand why any woman would get married. The Mother of the Groom, Abigail Blakeman, is a garden club stalwart firmly planted in coastal Connecticut. She thinks the whole enterprise would be so much easier if the wedding was at their golf club. Especially because the family’s fortunes have taken a turn for the worse. But when a sudden twist of fate calls them into action, these two very different women are forced to take over the wedding planning. How far will two moms go to make their children’s dream wedding a reality?

After 23 years of building careers and raising kids together, Jason and Nicole Elswick are ready for a break from their daily lives. Jason has spent years planning his dream sabbatical --- ditching work for a nine-month-long motorcycle trip through South America. But that’s Jason’s dream, not Nicole’s. After years working retail and parenting in Portland, Nicole craves the sun of the Southwest and the artistic community in Santa Fe, where she wants to learn jewelry design. A chance encounter at a dinner party presents a surprising --- and intriguing --- way out of their dilemma. Over a little too much wine, Jason and Nicole’s married neighbors sing the praises of the 500 Mile Rule: their policy of enjoying themselves however they wish --- and with whomever they wish --- when they’re temporarily far apart.

One fateful afternoon, Joan’s husband drops a bombshell: he’s fathered twins with another woman. A furious Joan impulsively decides to book a last-minute trip to Paris as an art courier: the person museums hire to fly valuable works of art to potential clients, discreetly stowed in their carry-on luggage. On the plane she chats up her seatmate, Nate, a tech nerd who invites her to dinner in Paris. But after a romantic dinner and an even more romantic night together, Joan wakes up next to her new lover to discover the drawings gone. Even more shocking is what’s been left in their place: a sketch from her father’s journals, which she thought had been lost when he died on 9/11, and a poem that reads like a treasure hunt.

Maggie, Eliza and Tricia Sweeney grew up as a happy threesome in the idyllic seaside town of Southport, Connecticut. But their mother’s death from cancer 15 years ago tarnished their golden-hued memories, and the sisters drifted apart. Their one touchstone is their father, Bill Sweeney, an internationally famous literary lion and college professor. When Bill dies unexpectedly, his shell-shocked daughters return to their childhood home and throw an Irish wake like no other. As guests pay their respects and reminisce, one stranger crashes the party. When journalist Serena Tucker had her DNA tested, she learned that she had a 50% genetic match with her childhood neighbor, Maggie. It seems that Serena’s chilly WASP mother, Birdie, had a history with Bill --- one that has remained totally secret until now.