Gallant

Fourteen-year-old Olivia Prior is missing three things: a mother, a father, and a
voice. One day she receives a letter from an uncle she's never met, summoning her
to his estate. She discovers that her uncle is dead and the estate almost empty.
Olivia remains, but must follow two rules: don't go out after dusk, and always stay
on the right side of a wall. It's hiding secrets of an ancient and magical realm, which
calls to Olivia through her blood...