Border Patrol Agent Danika Morales has sworn to protect the southern borders of the U.S., but that oath has cost her dearly. She has paid a heavier price than most: her husband, Toby, was murdered two years ago trying to help the very immigrants Danika was responsible for sending back to Mexico-and his murder has never been solved. Now a string of attacks and arrests leads her to believe that someone from McAllen profits from sneaking undocumented immigrants into the country, and it's very likely that this illegal activity is tied to her husband Toby's death. Even worse, someone within the Border Patrol might be involved. Danika wondersw who she can trust as she tries to solve her husband's murder and prevent more innocent lives from being destroyed.