Even in a land of eternal twilight, secrets can't stay hidden forever.
Seventeen-year-old Eyelet Elsworth has only one hope left: to find her late father's most prized invention, the Illuminator. It's been missing since the day a mysterious flash wiped the sun from the sky.
Living in darkness is nothing new to Eyelet. She's hidden her secret affliction all of her life—a life that would be in danger if superstitious townspeople ever guessed the truth. Orphaned when her mother is executed for a crime she did not commit, Eyelet sets out to track down the machine—her one and only chance at a cure.
Alone and on the run, she finally discovers the Illuminator—only to witness a young man stealing it. Determined to follow the thief and recover the machine, Eyelet must venture into the deepest, darkest, most dangerous part of her twisted world.