As does an unnamed lost boy, the abandoned effigy of evil, who wanders the globe without a clue and without a purpose.
The Last Angel Ero's only task is to find this boy and raise him into the arms of Grace. He doesn't expect to question that purpose-and he certainly doesn't expect to find an affinity with the evil inside the boy he names Sol.
It's only when Ero begins to explore new truths that he realizes just what having faith in Sol may cost him: his life, his love and his soul.