During World War II, a Basque shepherd named Basque leads a dangerous mission to help a French scientist, Professor Bergson, and his family escape from the Nazis. The group must cross the treacherous Pyrenees Mountains to reach Spain and evade capture. As they begin their perilous journey, they are pursued relentlessly by the sadistic and efficient SS officer, Captain Von Berkow. The terrain is rough and conditions brutal, adding to the group's struggle and heightening the tension.

While traversing through the rugged landscape, the group faces various natural and human threats, including the relentless pursuit by Von Berkow and his squad. As they edge closer to freedom, trust issues emerge within the group, and morale is constantly tested. Tension and danger escalate at every turn, keeping the group on high alert. Their endurance, skill, and solidarity are pushed to the limit as they must outwit their relentless pursuers to ensure their survival and secure their passage to safety.