Lumi, the last white hellhound, infiltrates Frostfang Keep and kidnaps Prince Aldric, intending to use royal blood to preserve his species. When he discovers Aldric's frost sickness, a forced arrangement becomes a year of mutual healing and love. Their six pups are born in two misleading forms. Believing Aldric means to kill the weak ones, Lumi flees with three. Three years later, those pups awaken as wolves and need their father's blood, forcing Lumi back into a trap set by Aldric, now the Wolf King. As the mistake unravels, the Wolf Council moves against their mixed family. Lumi awakens his true hellhound form, Aldric chooses his family over blood purity, and they build a home shared between Sunvale and Northreach.
