European mercenaries William Garin and Pero Tovar (Matt Damon and Pedro Pascal) must team up with a group of Chinese soldiers, including General Shao (Zhang Hanyu), to fight off an attack by ancient monsters and ravenous beasts on the world’s most iconic structure—the Great Wall of China. Every 60 years, the creatures rise from the nearby Jade Mountain to devour humans and everything else in their path.

As William battles them and tries to protect the Great Wall, he discovers the mystery behind the fortress and finds himself on a journey toward becoming a hero of the times.