While much of Disney's Rapunzel's story is the same as the Grimm Brothers' fairy tale, there are a few key difference. For starters, Rapunzel isn't a kidnapped princess. She's born to a regular man and woman, who have wronged a sorceress by stealing "rapunzel" from her garden. As punishment, the sorceress steals the couple's child and locks her away in a high tower with no doors. It's not long before a prince finds Rapunzel and figures out how to climb her hair.
When the sorceress catches onto what's happening, she chops off all of Rapunzel's hair and casts her into the wilderness. She then confronts the prince, who throws himself out the tower and goes blind from landing in a thorn bush. Eventually, the blind prince finds the lost Rapunzel, her tears give him sight, and they marry.