The Sunset Sovereign

There are seven Supplicants destined for the Capital, chosen as children by mysterious Voices, who are known only as the Sovereigns. When they come of age they begin the journey of passing their Trials and training to become a Scion in service to their benefactors.
Lynn and Willow go to Sunrise, Fabio and Aidan go to Day, Isobel and Hollie go to Sunset, Yvaine goes to Night.
Will the seven Supplicants pass the Trials and achieve their dreams? Or are they entering a nightmare?