Answer:
In the movie Braveheart, young William Wallace learns that King Edward the Longshanks' peace talks with Scottish rebels are a trap and that the English king has no intention of negotiating in good faith. Instead, Edward plans to use the peace talks as an opportunity to arrest and execute the Scottish rebels, including William's father, in order to quash the rebellion and assert English control over Scotland. This revelation motivates William to become a leader in the Scottish rebellion and to fight for the freedom and independence of his people.