On their nineteenth birthday, Maya and Sage receive a mysterious book with their names embossed in silver—and inside are chapters detailing their lives with impossible accuracy, including secrets no one else could know. But the story doesn't stop at the present; it continues into a future where one sister is destined to destroy everything the other loves. When Sage suddenly dies in what appears to be a tragic accident, Maya is devastated—until she finds a note suggesting her twin's death was staged. Now Maya must unravel why her sister would fake her own death, what terrible fate Sage was trying to protect her from, and whether the book's prophecy can be rewritten before it's too late. Because if the book has been right about everything so far, the worst is yet to come.