Felicia Hart, a 12 year-old outsider with a missing father and dead mother, stands between Earth and the infinite darkness threatened by the sinister Gloomthreaders. Secrets of science and the Universe are only part of the revelation as Felicia confronts the same choice that led to the death of her mother, relying on courage, curiosity, and her anxious companion, Hugo Tubbs, to uncover the location of the Unlight Weke, and ultimately her father.
The Valley harbours a dark secret. Among its cheerful villages and rolling farmland a sinister force is gathering strength. There is one group who can stop it – the Council of Solarius. From their base at Wellbourne Manor, the Council must work to protect three planets from annihilation, but the ordinary people of Earth must never find out their very existence is hanging in the balance. The Valley holds the key to Earth’s future.