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...