“Das Tagebuch” (“The Diary”) is a one-year short film project by Jan Herdin that was created as part of the Media Design program at Ostfalia University of Applied Sciences. Lisa is a lonely teenager growing up in a single-parent household. She finds it difficult to get along with her fellow classmates and has a crush on her teacher, Mr. Weber.

Mr. Weber finally understands what it is that Lisa wants from him – and lays down the law. Meanwhile, Dennis — furious at having been snitched on — runs off with Lisa’s diary.

As the youngest in the royal family, Prince Dietbert shows little direction or motivation except when it comes to girls. But his life is about to change.

While the frog prince is caught in a field, Anna is ecstatic to learn that she'll get to meet a fencing champion.

Anna isn't interested in boys like her best friend. Meanwhile, Anna's brother has caught a frog and is keeping it in the house.

Anna saves the frog from her brother, plays into the fairytale and sees him turn back into a prince.

Although Anna still doesn't entirely believe that Dietbert actually comes from the Middle Ages, she takes responsibility for him, first taking him shopping for a more current outfit.

Dietbert's new haircut helps him blend in a bit better, but he has developed a few strange tendencies over the years. Meanwhile, Anna tries to get her mother's permission to host him.

Master Gorm has also survived and reveals that a cruel fate awaits Dietbert.

Dietbert is convinced that he can win Anna's love, but Anna is more focused on hiding his identity from her family and other students at her school.

When Dietbert goes missing after being transformed back into a frog, Anna fears the worst.

After resorting to some desperate measures, Anna finds Dietbert again.

With Raoul and Lukas scheming to expose Dietbert, Anna takes him to her fencing lesson where he becomes very jealous of Anna's role model.

Dietbert's behavior drives Anna away, so he goes looking for love elsewhere. Meanwhile, Raoul's plan isn't working so well...

After dragging him out of Vanessa's party, Anna tells Dietbert she is still willing to try to help him reverse the spell.