In Mexico City's infamous Lecumberri prison, three drug-addicted convicts celebrate getting drugs from one of their the mothers. They are found out and locked up in the "apando," the dreaded punishment cell. Protests over the treatment of those held in the cell lead to a bloody confrontation.

• Conacite Uno
• Manuel Ojeda
• Salvador Sánchez
• José Carlos Ruiz
• María Rojo
• Delia Casanova
• Luz Cortázar
• Álvaro Carcaño
• Ana Ofelia Murguía