On any given Sunday morning, April Ashcroft can be found indulging in a guilty pleasure: reading secrets on the PostSecret.com website. However, when she comes across: "Everyone who knew me before 9/11 believes I'm dead," suddenly her certainty that her twin sister died twenty years earlier on September 11th is irreversibly shaken.

As she embarks on a secret search for her sister, April's life will unravel, throwing into question the twins' tight bond, their upbringing, their family expectations, and most of April's adult choices. This page-turner will confront readers with how secrets transform our relationships, burden their owners and those who learn about them, and, above all, the consequences of unfortunate mistakes that can never be undone.