Four prison inmates have been hatching a plan to literally dig out of jail when another prisoner, Claude Gaspard, is moved into their cell. They take a risk and share their plan with the newcomer. Over the course of three days, the prisoners and friends break through the concrete floor using a bed post and begin to make their way through the sewer system -- yet their escape is anything but assured.

• Filmsonor
• Play Art
• Michel Constantin
• Jean Keraudy
• Philippe Leroy
• Raymond Meunier
• Marc Michel
• Jean-Paul Coquelin
• André Bervil
• Eddy Rasimi