When Jane is asked to pick up her friend’s daughter, Florrie, from school, she can’t imagine the horror that will unfold. Because someone pretending to be Jane has already collected Florrie. And now the little four-year-old is missing... Things don’t get any easier when Jane starts receiving anonymous letters that include intimate details about her life. As a psychologist and agony aunt, she's used to getting letters asking for advice, but these are different. Are they somehow connected to the missing child?

Debbie Mullen is losing it. For years, she has compiled all of her best advice into her column, Dear Debbie, where the wives of New England come for sympathy and neighborly advice. Through her work, Debbie has heard from countless women who are ignored, belittled, or even abused by their husbands. And Debbie does her best to guide them in the right direction. Or at least, she did.

Amy is trapped in a nightmare with Jason, a controlling, violent husband. Then on a short cruise without him, Amy befriends Liz, a young woman traveling alone on her way to meet her birth mother for the first time. Liz looks so much like Amy that they could be sisters. When Amy regains consciousness after a terrible accident that takes the lives of many passengers, she finds that, because of a mix-up in personal effects, everyone believes she is Liz. Only she knows it is Liz who has gone missing, presumed dead.

Kit Darling is a maid with a snooping problem. She’s the “invisible girl,” compelled to poke into her wealthy clients’ closely guarded lives. It’s a harmless hobby until Kit sees something she can’t unsee in the home of her brand-new clients: a secret so dark it could destroy the privileged couple expecting their first child. This makes Kit dangerous to the couple. In turn, it makes the couple—who might kill to keep their secret—dangerous to Kit.

Tamsin recently married renowned composer Robin Featherstone. Robin is much older, but Tamsin doesn’t care—she’s in love. And she knows Robin loves her too, even if he is very close to another young woman—his assistant, Mia. Meanwhile, Robin’s ex-wife and grown children aren’t happy—they’re sure Tamsin is a gold-digger and Mia is an opportunist. Then, when Robin suddenly dies, the family’s worst fears are realized: Tamsin stands to inherit everything. But when the will is read, its contents are beyond shocking.