A thin line exists between reality and the paranormal, between one country and the next. Lucia grew up stuck between cultures on the border of Texas and Mexico and the wavy lines of reality. With the help of her two sisters, she runs the family ranch, or what's left of it. A hurricane shifted the river, with land ending up on the other side of the Rio Grande. Mother Nature unleashed more than land wars. A prophecy foretells a supernatural beast slaughtering the livestock every seven years. When the carcasses of goats show up drained of blood, she reaches out for help.
Shaw McDiamond doesn't want to be stuck in a hick town that's dry and humid, chasing after the legend of the chupacabra. As part of an elite force of paranormal agents that work the border, Shaw's group, S.L.I.C.E., exposes aliens of another kind. This vampiric creature is like nothing he's encountered before, and the woman he's working with unnerves him even more.
Lucia and Shaw clash over legend and reality, prophecy and free will. As the killings escalate with the attack of a ranch hand, the storm returns, and the two become trapped in an ever-shifting world they can't control. But to survive, they'll have to do it together.