Men and women come to Castle Always to receive a destiny. Few of those questers survive to return home. Mysterious, difficult to find, and possibly sentient, the Castle keeps its secrets hidden away where no one thinks to look for them.

Unlike other questers, Ailanthe just wants to return to her forest home. She travels to the Castle searching for something to send her back, not for a destiny. But the Castle refuses to let her leave—and worse, it wants her dead.

With the help of another man trapped by the Castle, Coren, and the mysterious cat Miriethiel, Ailanthe sets out to unravel the truth about the Castle not only to gain her freedom, but to save her life.