An advocate for endangered species, journalist Kelsi Gorman travels to the Brazilian Amazon to locate a mysterious black jaguar the size of a saber-toothed tiger. Instead, the enormous cat finds her knee deep in mud, blood, and smugglers. Jaime Salazar, one of a few surviving male jaguar shifters, encounters a scent he never thought to find—a female jag shifter. Jag queens exist only in the elder’s stories, but someone staked out a she-cat like poacher bait. In a fit of primal instinct, Jaime marks Kelsi as his mate. Now, no other female will arouse him. To avoid a long celibate life, he is forced to woo his reluctant mate-to-be. But first he must keep her alive.

Well-meaning friends drag archaic jaguar shifter Matteo D’Cruz back into the human world. Almost trapped in cat form, the recalcitrant male narrowly dodges execution as a feral. Even so, his final end doesn’t concern him overmuch—until he meets the thrill-seeking Dakota Gorman, a latent shifter female. Matteo helps trigger her first transformation into a magnificent jaguar, and in turn, she schools him on the twenty-first-century woman. Hopeful for the first time in decades, Matteo embraces a possible future with the formidable jaguar queen. Tragically, their intimacy nearly forces him back into cat form, which would put him on death row. Unwilling to selfishly ask Dakota to wait for him, a desolate Matteo resigns himself to torture and watching her mate another. Instead, in a vicious plot to weaponize shifter DNA, a rogue military faction snatches her, carving Matteo’s heart from his chest. He will bring her home—but at what cost?