Border Patrol Agent Danika Morales has sworn to protect the southern borders of our nation, but that oath has cost her. Two years ago, her husband, Toby, was killed trying to help the very immigrants Danika was responsible for sending back to Mexico. His murder was never solved. But now, a recent string of attacks and arrests leads her to believe that someone in McAllen is profiting from sneaking undocumented immigrants into the country . . . and it may somehow be tied to Toby’s death.