Myrna, Leonie, and Chrissy meet every Thursday to sample fine cheeses, to reminisce about their former lives as professors, and lately, to muse about murder. Decades ago, a vicious cabal of male poets contrived—quite publicly and successfully—to undermine the writing career, confidence, and health of their dear friend Fern. Now, after Fern has taken a turn for the worse, her three old friends decide that it’s finally time to strike back—in secret, of course, since Fern is far too gentle to approve of a vendetta.

Holly is dealing with the impending death of her grandmother and still reeling from a bad breakup. One bright spot: a Valentine’s Day card on Holly’s windshield—even if it wasn’t meant for her. An amusing mistake soon turns into a lovely exchange of anonymous notes, little acts of kindness, and a growing affection between two strangers. What happens when one of them has to say goodbye?

Kezia Cooper Hobson, recently widowed, arrives in New York from San Francisco. Determined to make a fresh start, she has just completed the sale of her Pacific Heights home, not to mention her husband's venture capital firm, and in doing so, is also freed from her responsibility as a board member of the company. Bringing with her only a few personal treasures, she is excited to move into the blank slate of a beautiful midtown penthouse, in the city that she has always loved. It is also where her two adult daughters now live.

One typo, and a boy and girl connect by chance. Wishing each other a happy Valentine’s Day isn’t the end. In fact, it becomes a friendly annual tradition—with rules: no pics, no real names, nothing too personal. As years pass, the rules for their email “dates” are breaking, and they’re sharing more than they imagined—including the urge to ask…what if we actually met?

Hollis Shaw, creator of the popular food blog, Hungry with Hollis, is shocked when her heart surgeon husband, Matthew, is killed in a one-car accident on a snowy morning. The cracks in Hollis’s perfect life—her strained marriage and her complicated relationship with her daughter, Caroline—grow deeper. So when Hollis hears about something called a “Five-Star Weekend”—one woman organizes a trip for her best friend from each phase of her life: her teenage years, her twenties, her thirties, and midlife—she decides to host her own Five-Star Weekend on Nantucket.