There’s this beautiful princess who loves to play with her golden ball so of course she freaks out when it rolls down a well. While she’s crying, a frog asks her what’s wrong. She tells him about the ball and he offers to get it for her…for a price. She offers him her jewels, crown, clothes, but all he wants is to be her companion and share food, drink and a place to sleep. The princess agrees, but she knows she isn’t going to keep her promise, so she grabs the ball as soon as the frog finds it and then runs home. The next day, while she’s eating from her little golden plate with her father the king and all the courtiers, the frog knocks super-loudly at the door and reminds the princess of her promise. Frightened, she confesses to her dad and he tells her to keep her promise. She unhappily shares her meal with the frog and then has to carry him upstairs to her pretty clean little bed. The very thought of the slimy critter sharing her clean sheets grosses her out, but her father gets ticked at her for not helping someone who helped her, so she has to. She puts the frog in a corner of the bedroom but he insists on sharing the bed with her, which enrages her so much that she picks him up and throws him against the wall.
But then he turns into a prince. The two talk and he reveals that he was cursed by a wicked witch, and then they go to bed. The next morning, eight horse carriages come to retrieve the new couple so the prince can go back to his kingdom. The prince’s servant Iron Heinrich is there, and during the carriage ride there’s a cracking noise that turns out to be each of the three iron bands Heinrich had secured around his heart to keep it from breaking of sorrow at his master’s enchantment. And they lived happily ever after.