For illegal immigrants that make their way across the Texas border, the crossing is the easy part. Beyond the border lie hundreds of miles of harsh ranch lands with little water, dangerous wildlife, and vegetation that slices skin like razors. Caroline Bishop, a fifth generation Texan, rancher and widow, has little sympathy for those who attempt this journey, especially the ones that cross her property every night to avoid the nearby Border Patrol checkpoint. Though some are mere migrant workers, many are drug dealers and human traffickers known to be armed and dangerous.
Frustrated with the Border Patrol’s inability to secure their lands, Caroline and a small group of local ranchers have taken matters into their own hands and formed the “Border Brigade” – a group of citizens nostalgic for a time when border communities were peaceful and prosperous, when doors could be left unlocked and safety and security were not a concern.

Though their apprehension is valid and their intentions honorable, their methods are questionable and have caught the attention of Riley, a local Border Patrol Agent who believes Caroline and her friends walk a fine line between concerned citizens and vigilantes. It is a fine line Caroline unintentionally crosses when in an act of rage, she shoots blindly into the night to scare of a human trafficker that has just killed her dog. The next morning, Caroline opens her front door to find Nadia, a wounded Mexican woman, sunburned, cut, bruised and wearing little more than rags, bleeding out in her front yard. Deserted by the cartel smuggler, she is lucky to be alive. Caroline has two choices… take her in and have the Border Brigade shut down for her actions or patch her up and returns her to Mexico. Against the advice of Hector (a legal Mexican-American who grew up with Caroline's husband and now manages the ranch after his passing) Caroline chooses the later.

With the help of Alice, a local bartender who has been taking nursing classes at night, they stabilize Nadia, but that's just the beginning of her problems. A witness to the murder of a Border Patrol Agent and abandoned with valuable contraband, the cartel leaders want Nadia and anyone who has come in contact with her, dead. Caroline dug a much bigger hole than she ever could have imagined and now must decide just how far she is willing to go to save this girl's life. At a crossroads, Caroline finds that her perspective on the life she has lived has been permanently altered. It isn’t until he’s standing next to Nadia, at the water’s edge of the Rio Grande, that she realizes she’s going to have to choose between two very different and uncertain futures.