This brand-new adventure series filled with laughs, danger, and facing fears, follows Freddy von Frankenstein and his monster big brother, F.M., as well as and his were-cat sister, Riya, as they explore the supernatural mountain they call home and discover all the fantastical creatures living there! The dreaded day has come-Freddy's parents have finally made him start going to school! Freddy feels bored there and misses inventing stuff and spending time with F.M., but Riya loves it and has made many new friends. However, while Freddy and Riya are away at school, the powerful Monkey King is drawn to the palace and takes it for his new home over the objections of F.M. and his mom and dad (while Igor loves having another monkey in the palace). Will F.M., Freddy, and Riya be able to stop the magical trickster with the help of a new friend?