El Negro, a "pollero" hired to cross a group of undocumented immigrants to the United States, decides that this will be his last trip for the organization. He wants to get out of business. The chiefs suspect him and send a subaltern, "El Gavilán", to watch him. On the rugged crossing the polleros betrayed themselves, losing part of their human "cargo". The Negro escapes from his former partners and also from justice. El Gavilán returns unpunished to his work as a "hooker." Nothing stops the deadly machinery of human trafficking.