Cormac Flynn, a raven shapeshifter, is ancient, Celtic, and cursed. Arianne Leone, a mountain lion shapeshifter, owns an art gallery in Deep Ellum, a popular tourist attraction and haven for musicians for decades. Together, they are charged with guarding the one who bears the Hermit's Stone, an ancient artifact that has held worlds together—and kept them separate—for eons. Possession of the stone falls to Ari's friend and art student, nineteen-year-old Nico Garcia. When Nico's parents are killed in an attempt to destroy him, Ari and Mac must set aside their differences and work together, protecting Nico at all costs…