Given a renewed lease on life by Eliot, another student who lends him a hand against the Baskervilles at Lutwidge Academy, Oz Vessalius is surprised to learn that his savior is a Nightray, just like Gil - not to mention he's also Gil's little brother and the rightful heir to the dukedom! Considering how the Nightrays have plotted against the Vessalius clan in the past, will the two boys ever get along?