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A suddenly appearing sister and an erased clan.
A strange black hound and a blood-soaked traitor.
The chance for a new family-and the danger of losing the old one forever.

Nikko and Taiki once again face unanswered questions, long-forgotten myths, and the simple struggle of staying alive. Their search for truth leads them to the most precious magical artifact ever believed lost-straight into the shadows of the deadly perils it carries with it.