"When twenty-year-old nursing student Frances "Frankie" McGrath hears these unexpected words, it is a revelation. Raised on idyllic Coronado Island and sheltered by her conservative parents, she has always prided herself on doing the right thing, being a good girl. But in 1965 the world is changing, and she suddenly imagines a different choice for her life. When her brother ships out to serve in Vietnam, she impulsively joins the Army Nurse Corps...

The year is 1846. After the controversial annexation of Texas, the US Army marches south to provoke war with Mexico over the disputed Rio Grande boundary. Ximena Salomé is a gifted Mexican healer who dreams of building a family with the man she loves on the coveted land she calls home. But when Texas Rangers storm her ranch and shoot her husband dead, her dreams are burned to ashes. Vowing to honor her husband's memory and defend her country, Ximena...