After discovering a mysterious door in her apartment hallway, Lila Grant finds a hidden underground library that records the life story of every person in the city. When she discovers her own book writing itself in real time, she learns the library also holds shelves filled with every possible future her life could take. Realizing the future is not fixed but shaped by the choices she makes, Lila accepts her role as the one person who understands the living stories quietly unfolding beneath the world.
