Harvie and the Magic Museum follows the story of a young boy named Harvie who is obsessed with playing a particular computer game and wants to be famous for it. One day, he finally reaches the last level of the game and feels a great sense of accomplishment. However, his joy is short-lived as he receives a weird message on his computer screen, inviting him to visit the city's old puppet museum.
Along with his faithful dog Jerry and his friend Monica, Harvie sets out to discover what the strange invitation is all about. Upon their arrival at the museum, they meet a mysterious man named Ratimir who becomes their guide in a world full of puppets and magic.
Ratimir tells them that they are the chosen ones who must restore the magic to the puppet world by finding a powerful magic crystal that has been stolen by the evil puppet master. The crystal is the source of all the magic in the puppet world and without it, the world of puppets will disappear.
Harvie and his friends embark on a perilous adventure to retrieve the magic crystal, battling various dangers and obstacles along the way. With the help of Ratimir and his magical powers, they face off against the evil puppet master and successfully retrieve the magic crystal.
In the end, Harvie and his friends restore the magic to the puppet world and become heroes in their own right. Rather than just satisfying his own desires, Harvie learns the importance of teamwork and selflessness in achieving great things.