When a body is found on the bridge connecting El Paso and Juarez, two detectives, one from the United States and one from Mexico, must work together to hunt down a serial killer operating on both sides of the border.

Marco and Sonya investigate the body from the bridge. Frye learns that the Killer isn't done with him. Charlotte makes an unwelcome discovery on her property.

The clock ticks as Maria's broadcast continues. Sonya searches for the girl's location. Against protocol, Marco works a unique ransom angle. A powerful Juarez force crosses the border.