What if the object you're protecting is worth more than your life — and you don't even know what it is?
Jax is in New Mexico chasing adrenaline when Kingsfield finds her. Something has been taken from the Basilica of Our Lady of Guadalupe in Mexico City. Three men on horseback have been moving it north for months — through cartel territory, across borders, into country where roads don't go and maps don't help.
Joseph leads the riders. Former SEAL. Cartel infiltrator. A man with a trident on one shoulder and the Sacred Heart on the other. He's not running. He's protecting.
Jax joins as go-between. She becomes something else.
A cartel that worships darker things wants what Joseph is carrying — not to sell, but to destroy. And a comet no one can explain has been tracking their path since Mexico.
In the high desert, Jax will face what she's been outrunning since the glacier, since the Gardner, since her mother's death: the question of what's worth dying for. And what's worth living for.
"Higher Calling" follows Jax into territory where faith isn't metaphor and the miraculous doesn't ask permission.