Po saves a girl from some bandits, only to learn that she's engaged to be married to the Dragon Warrior.
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While using stilts to advertise for Mr. Ping's Noodle shop, Po and Monkey spot a goat girl and her father being menaced by bandits. They come to the aid of the pair, and Po notes that the girl is not only attractive but possesses some kung fu skill. Once the bandits have been driven off, the goats introduce themselves as Lu-Shi and her father Mu-Shi, and reveal that Lu-Shi is to be married...to the Dragon Warrior. Mr. Ping confirms the arrangement, revealing that he and Mu-Shi made the deal years ago in exchange for Mu-Shi providing dishes to replace those constantly broken by the young Po.
Finding that Lu-Shi also shares his love of action figures, Po quickly warms to the idea. The Furious Five, particularly Tigress, are stunned, while Shifu questions whether Po is sure about his decision. He then informs the panda that, according to the rules of the Sacred Onyx Council, if he gets married he will have to step down as Dragon Warrior in order to keep his wife safe. Po finds himself torn between his love of being Dragon Warrior and his feelings for Lu-Shi. Eventually he decides to marry her, while Crane begins organizing the ceremony.
Tigress, meanwhile, is suspicious of Lu-Shi and confronts her, and discovers that her locket contains a picture of a male goat. They begin to fight, but Po breaks it up believing that Tigress is acting out of jealousy. The ceremony is soon underway, but Po hesitates to go through with the marriage. Mu-Shi soon explodes at Po, but his suspicious behavior prompts him to drop the act: he is revealed to be none other than a magically disguised Junjie. He reveals that he engaged in the farce in a bid to force Po to step down so he could claim the Jade Palace, and Po is left heartbroken as Junjie's leopard students emerge and attack.
After a brief battle, Shifu and the Five are trapped underneath a lattice erected for the ceremony while Junjie's party leaves with Lu-Shi in tow, while Lu-Shi throws her locket to Po. She reveals that the goat pictured inside-whom Po quickly assumes is her boyfriend-is being held hostage by Junjie to make her cooperate. Further dismayed, he nevertheless goes after them in a bid to rescue Lu-Shi and the captive Shao, and manages to defeat Junjie in a battle of stilt kung fu. He then learns that Shao is in fact Lu-Shi's brother, not her boyfriend, and Lu-Shi expresses interest in being friends rather than going on with the arranged marriage.
Shifu: “Marriage is a big step, Po, and you just met this girl. Are you sure you're ready?”
Po: “Well, we are combining our action figure collections, so there's that...”
Shifu: “Po, if Lu-Shi is the wife of the Dragon Warrior, she will be the kidnap target of every villain and scoundrel in the land!”
Po: “Wow, I hadn't thought of that.”
Shifu: “You'll be putting her in grave danger. That's why the rules of the Sacred Onyx Shaolin are so specific.”
Po: “Specific how, specifically?”
Shifu: “You really don't know, do you? You'll have to step down as the Dragon Warrior.”
—After Po's marriage announcement
Tigress: “Po must really love you to give up being the Dragon Warrior.”
Tigress: “I guess you must really love him, too...”
Lu-Shi: “I care for Po.”
Tigress: “Care for him? Or using him? [She knocks necklace out of Lu-Shi's hooves to reveal a picture of a male goat inside.] Who is this?!”
Lu-Shi: “It's not what you-- [She pushes Tigress away, picks up the necklace, and then stands to engage in a fight.] Walk away, lady. ([quietly to herself] Totally facing off with Master Tigress. So cool!) Tigress, I don't want to hurt you.”