Jakob is an ordinary boy, but when he meets the cuddly monster Knuddi in the forest on his way to school one day, his life changes abruptly. After all, he wants to help Knuddi usher in a new age to make the world a little better again.

Together with Knuddi, the librarian Karl Gregorski and his father Richard, Jakob experiences an exciting adventure in which a stone tablet and a crystal ball play a key role. Once the stone tablet full of cuddly monster symbols has been deciphered, the two friends are faced with two important questions: Who can they trust? And will Knuddi succeed in starting the new age, even though someone is trying hard to prevent it?