The missing girl is in the count's chambers, to the right of the laboratory. You can only open the cage when you have created an anti-vampirism serum (mixing the garlic, wolfsbane, and mandrake root). When you do, there is a silver cane at the right of the room that you can use to hook the key.
(see related solution question)
You have to find the girl in the cage and stop the vampire!
In the vampires castle
look in ugana kony has her held hostage
the answer is vampires curse island
in poptropica
i thought it was underground
if you think so but not really
how to get out of the clifs on poptropica
We can get the key in vampires curse island with the help of the hook on the right side of it.
you go to the vampires castle and look around and save the teenage girl from the cage then get him away with the garlic.
you have to click on the cane, you will find it next to the umbrella in the corner sparkling :P
Finish the entire island. Don't be stupid. Work it out.