At America's busiest land border, US Customs and Border Protection officers tackle complex cases involving drug cartels, illegal immigration, and the pandemic's impact. As they intercept weapons, contraband, and drugs, officers navigate the tense environment with vigilance, exposing the dangerous tactics smugglers use and the human stories behind illegal crossings.

At America's busiest land border, US Customs and Border Protection officers tackle complex cases involving drug cartels, illegal immigration, and the pandemic's impact. As they intercept weapons, contraband, and drugs, officers navigate the tense environment with vigilance, exposing the dangerous tactics smugglers use and the human stories behind illegal crossings.