Philippe Gaston is a thief known as "The Mouse" who commits little thefts during the thirteenth century. While he is going to be executed he manages to flee; afterwards he is saved by another arrest made by Etienne Navarre, a retired guard captain. So, Navarre and his inseparable hawk are Philippe’s new friends. The reason why Etienne rescues him is that he wants Philippe to help him kill the Bishop. Philippe does not want to and Navarre ties him up; then, after fleeing and meeting a savage wolf, Philippe is saved by a mysterious beautiful woman. After the Bishop’s soldiers find him, Etienne saves him again. At this point, a series of adventures and fighting start. The film was nominated to two Oscars and has become a fantasy cult-movie of the Eighties.