
Princess Merida is a highly skilled archer who lives in the Scottish kingdom of DunBroch with her mother Queen Elinor, and her father King Fergus.
On Merida's sixth birthday, King Fergus gives Merida a bow and short arrow as a birthday present. After picking up an arrow that was accidentally shot into the woods, where Merida sees some Will O'The Wisps, a little blue fairy who is said to be taking you to your fate, the Merida family is attacked by an ancient bear, Mor'du.
Elinor and Merida escape, while Fergus and his men stay behind to fight the bear.
The story is cut to about ten years later when the film finds out that Fergus lost his left leg during a battle with Mor'du and has vowed to find Mor'du again and avenge his leg.
Ten years later, despite Elinor's intention to make sixteen-year-old Merida a proper noble daughter, Merida is determined to seek freedom and live her own life.
One day, Lords Macintosh, MacGuffin, and Dingwall arrive to dedicate their son to Merida's engagement. After an altercation, the three armies engaged in a fight, which Elinor stopped.
He stated that the challenge that the firstborn of each clan would follow would be decided by a fair maiden. Merida, hearing this, believed that the idea of contestants being firstborn was a loophole, so Merida chose archery.
The first two contestants had no skills, and Lord Dingwall's son won with a favorable accident.
Merida then steps forward with her bow and claims that she represents her clan as the firstborn and will shoot to claim herself.
Despite Elinor's objections, she shot all three targets, even splitting the Dingwall arrow, which supposedly won the contest.
Merida and Elinor are at odds, with Elinor claiming Merida still has to choose applicants. Merida cuts the family rug angrily and Elinor throws Merida's bow into the fireplace.
Merida flees on her horse in tears as Elinor quickly takes the bow from the fire with regret. After discovering a circle made of stone, Merida again finds Will O' the Wisps.
The witch says she won't help Merida unless she buys a woodcut; in response, Merida buys a lot, exchanges necklaces, but says she wants a spell that will change her fate as well.
Merida asks for a spell that will change her mother, which she assumes will change her fate. The witch conjures a tart cake to give Merida to her mother.
On Merida's exit, the witch thought she had forgotten to tell Merida something about the spell, but she and her cottage disappeared as Merida turned to ask what the witch had said.
Empty and locked her in the tapestry room to protect her. Fergus then sets off with the nobles to capture Elinor, while Merida is trapped in the tapestry room.
Later she discovers that her younger brother has also turned into a bear cub for biting a tart cake. Merida asks them to take the key from their nanny Maudie, who has the key. The three take the key and free their sister.
The four rode Angus while Merida sewed the rug. They follow the blob to where Fergus catches Elinor and binds her.
Fergus tries to kill the bear, but Merida defends Elinor by fighting Fergus, who still distrusts Merida. Later Mor'du meets Merida and fights Fergus and all the other soldiers who try to kill him.
He then lunges at Merida but is confronted by Elinor, who breaks away from the ropes. Mor'du and Elinor dueled each other until Elinor crushed Mor'du to stone but injured Elinor in the process.
Mor'du got up and was about to attack Merida when a rock stood falling on him, and he died. Merida sees a blob emerge from Mor'du's body; it appears as a brother who had become a bear before disappearing.
Then Merida rushes to Elinor and puts the sewn rug on top of the bear. When the sun rises, and Elinor does not return to her human form, Merida throws herself around Elinor and reconciles, apologizing for what she has done and telling her mother that she loves her.
When the sun rises, Merida discovers that Elinor is back in human form, and they both embrace. The clan settled their argument and parted ways. Meanwhile, Merida and Elinor ride their horses around Scotland, making their mother-daughter bond stronger.
In the post-credits scene, a magician crow and a magic broom deliver wood carvings to the castle, asking the stunned guards to sign a shipping note.