HSI tracks a suspicious vehicle for 48 hours, leading them to a San Diego stash house. CBP in Calexico uses a specialized scope to locate narcotics.

Rookie CBP officers find multiple drugs, HSI runs an undercover buy-bust operation, and agriculture specialists stop pests and prohibited items.

HSI arrests human smugglers and discovers overcrowded and rundown stash houses in New Mexico. CBP extracts meth from shipped machinery in Miami.