Amália Kessler has made a career out of uncovering secrets buried in old documents. She never expected to find her own family hidden inside one. When she is hired to authenticate the Ahlers family's century-old wedding ledger, Amália discovers a name that should not be there: "Elena Kessler—her mother, who supposedly had no connection to the powerful Ahlers family." Before she can learn the truth, the page disappears. Then Bento Ahlers, the family's guarded and infuriating heir, warns her to stop digging. Amália refuses. As she searches the estate's forbidden archives, she uncovers secret marriages, manipulated inheritances, vanished women—and a decades-old agreement bearing her name. Bento knows more than he's admitting. Amália knows he is lying. Yet the closer they get to the truth, the harder it becomes to deny the attraction growing between them. Because the ledger isn't simply recording the Ahlers family's weddings. It is recording the bargains that destroyed them. And Amália may be the final woman written into its most dangerous secret.

Catarina Valença makes a living writing promises for people who believe in happily ever after. She doesn't. When she is hired to write the wedding vows for Bento Ahlers—the guarded heir to one of Brazil's oldest vineyard estates—Catarina expects another wealthy client, another beautiful ceremony, and another marriage she knows will probably outlast the love behind it. Then the bride disappears. Hours before the wedding, Catarina discovers something far stranger than an empty bridal suite: a rewritten set of vows containing clues that suggest the bride didn't run away. She left because she discovered a secret buried inside the Ahlers family. And somehow, Catarina's own family is part of it. Forced to remain at the estate, Catarina and Bento begin searching for answers while fighting an attraction neither of them can afford. But Bento has been keeping a secret of his own. He knew Catarina's name long before he hired her. And the closer they get to the truth, the more dangerous their love becomes.