The Legend of Abby Adrae

The Legend of Abby Adrae is a book I haven't started writing yet. But here is a summary of it:

This story is about a girl who discovers her family's business. 

For the past couple of years, there's a stone missing in the family business that takes care of their family. Without the stone, their family is in danger. That's why over the past 4 years, lots of unusual things have happened. A villain, Dexter, has hidden the stone, which Abby later realizes. When she does, she and her best friend, Lizzy, go on an adventure to bring back the the family stone.

Will she be able to do it?