Single mom Kenzie Calhoun has returned to Burkitt, Texas, and the Aces High Ranch determined to build a loving home. She has a new position as a nurse on an air medical evac team, a house to remodel, and a whip-smart six-year-old daughter to raise. After a disastrous marriage, the walls around her heart are high. There's no room for another mistake in the romance department. Major Deke Hayes takes pride in his air evac helicopter service that assists area ranches, including the Aces High, during roundups and predator removal. In his spare time, he flies emergency calls for the local hospital. But his call sign, Lone Wolf, says it all: his trust issues mean he flies through life solo, too. That is, until precocious Brooke Calhoun, with a penchant for climbing trees and a fondness for sprinkles on cupcakes, can't help but bring the two adults together with her antics. Will Kenzie and Deke see that sometimes walls have a way of crumbling in the face of second chances?