In 1926 New Orleans, a determined young woman named Tiana dreams of opening her own restaurant. She works two waitress jobs to save every penny, leaving little time for a social life or big ambitions beyond her culinary goals. Across town, the arrogant Prince Naveen of Maldonia arrives with a carefree appetite for life, looking to marry into money so his family fortune can be revived. His plan centers on Charlotte La Bouff, Tiana’s wealthy best friend, whose father, Big Daddy, hosts a grand masquerade ball in Naveen’s honor. Beignets and opportunity seem within reach for Tiana when Charlotte asks her to whip up treats for the party, promising enough money to buy an old mill she can convert into a restaurant.
But the night twists into danger when Naveen and his loyal aide Lawrence cross paths with Dr. Facilier, a sinister voodoo practitioner who plots to rule New Orleans. Facilier uses a talisman stuffed with Naveen’s blood to transform Naveen into a frog and turn Lawrence into a spitting image of Naveen. His scheme is to have the disguised Lawrence win Charlotte’s hand while the real Naveen remains out of sight, enabling Facilier to seize the La Bouff fortune by manipulating the king and the crown. At the ball, a disappointed Tiana notices she’s been outbid for the mill, and a misstep leaves her covered in food, so Charlotte lends her a princess costume. Feeling defeated, she wishes on a star for a miracle, and fate seems to respond when Naveen appears, mistakenly assuming she is a real princess.
Naveen begs for a kiss to break the spell—promising wealth and a better life for Tiana if she helps him. Reluctantly, she agrees, hoping to secure her restaurant’s future, but the kiss plunges them both into the same magical trouble: they are transformed into frogs and must flee into the nearby bayou. There, they meet Louis, a jazz-loving alligator who dreams of joining a big-band life, and he urges them to seek out Mama Odie, a wise voodoo priestess who lives deeper in the swamp. Their journey is aided by Ray, a firefly with a sunny disposition, who glows with guidance and a hint of help from the spiritual world. Together, the trio pushes toward Mama Odie’s home, hoping for a cure and a way back to their human forms.
As they travel, Tiana and Naveen begin to see each other in a new light. Naveen learns to be more responsible, and Tiana discovers that love and partnership might be as important as money in achieving her dream. But time is not on their side: the talisman begins to run dry, and Facilier grows more desperate. He calls on his shadow demons—the “friends on the other side”—to help retrieve Naveen by replenishing the talisman with Naveen’s blood, threatening to ruin countless lives in the city if he succeeds. Mama Odie confirms that only a kiss from Naveen to a true princess can break the spell, and Tiana realizes that Charlotte, who has been crowned Mardi Gras royalty, will remain a princess only until midnight.
The group catches a steamboat back toward New Orleans as Naveen explains his feelings for Tiana and contemplates proposing. After a heartfelt talk, Naveen decides against proposing at that moment, understanding that a true future—for both of them and Tiana’s dream of a restaurant—depends on a plan that hinges on him kissing Charlotte. The talisman’s power wanes, Facilier’s forces close in, and the shadow demons capture Naveen to fuel their master’s conquest. Ray reveals Naveen’s love for Tiana, spurring her to race to the Mardi Gras parade to save him, only to find that the disguised Lawrence is marrying Charlotte in Naveen’s place.
Ray steals the talisman and salvages Naveen, but is mortally wounded by Facilier, who offers to grant Tiana’s dream in exchange for the talisman. She refuses to dishonor her father by aiding Facilier and destroys the talisman, breaking his power and forcing the voodoo spirits to drag Facilier into their world. Lawrence is arrested for his role, and Charlotte’s kiss remains just out of reach as the clock strikes midnight. Ray dies, then is reborn as a star at his funeral, a small, hopeful light in the night sky.
With the spell broken, Tiana and Naveen acknowledge their deepening love. The couple are wed by Mama Odie and, as a final twist of magic, are restored to human form because Tiana has become a true princess. They return to the city, where they fulfill their dream in tandem: opening a restaurant that anchors their life together, named Tiana’s Palace, a symbol of perseverance, partnership, and a shared dream brought to life.