Valombreuse has become the most resplendent city in the Empire. Ancient Blood has become extremely rare, and those who have it are all the more powerful for it.
With tensions running high between the kingdoms, young Vélar, heir to the crown of Déréïs, takes his turn at the Solstice Ceremony. At the same time, the last Vein, dedicated to "the protectors of the Dawn", arrives in Solaria and is entrusted with the mission of escorting the daughter of a wealthy merchant to Valombreuse: Sub sole Veritas.