Juan and his wife Blanca lead a peaceful life, until the day Juan is captured by dangerous drug traffickers. In search of him, Blanca discovers, in the middle of the jungle, astonishing clandestine workshops: the smugglers assemble submarines of fortune there to transport the drug towards the Mexican coasts. Involved in spite of herself, Blanca will have no other choice than to follow the cartel, under the surveillance of the mysterious Javier.