Esme has run the guest house for as long as anyone in Ballycove can remember. But in her declining years, her sight is failing, and when she has a fall on the eve of the summer season, she is forced to take a back seat for the first time in her life. From her chair in the entry hall, not much passes Esme by. There's Cora, the wife visiting indefinitely... without her husband; Niamh, the city professional with a life-changing decision to make; and Phyllie, the grandmother whose family is slipping away from her.

When Georgie, Iris and Nola's mother died and their father disappeared into his grief, the sisters made a pact: they would always be there for one another, no matter what. Now, decades later, they haven't spoken for years and can barely stand to be in the same room. As his health declines, their father comes up with a plan. In his will, he states that before they can claim their inheritance, they must spend six months living together in their childhood home in the village of Ballycove, Ireland, and try to repair their broken relationships.

Constance Macken, in her ninth decade, is looking back on a life filled with laughter and loss, tragedy and triumph, but knows it is time to right the wrongs from her past that have always haunted her. Heather Banks arrives on the island to bury her mother. Already adrift with her business sold and her divorce finalised, time on the island may be the perfect opportunity to change the course of her future.

Though they come from the same small Irish village, lonely widow Ruby and struggling single mother Frankie couldn’t be more different. Then they discover the Moonlight Gardening Club, founded to remind its members that even on the darkest of nights, beauty and light can still be found. As they plant flowers chosen specially to be enjoyed under a carpet of stars in the gentle glow of moonlight, an unexpected friendship starts to bloom – and it might be just what each of them needs. But when shocking secrets from the past are revealed, both their worlds are turned upside down.

Lauren and her family—lucky bastards—have been granted the use of a spectacular brownstone, teeming with history and dizzyingly unattractive '70s wallpaper. Adding to the home’s bohemian, grungy splendor is the bar occupying the basement, a (mostly) beloved dive called The Sweet Spot. Within days of moving in, Lauren discovers that she has already made an enemy in the neighborhood by inadvertently sparking the divorce of a couple she has never actually met.