A World Gone Half Mad

Jullian's parents have been dead for years now. She's an average seventh grade student, barely keeping an A and B report card. She loves archery and climbing, while her little eight year old brother Logan likes comic books and video games. Her kindergardener sister, Sofia loves fashon and is really too young for much more. They live with their mom's dad, Grandpa Tom, in New York.
When a strange boy Jullian's age suddenly appears saying that their lives may be in danger, they are pulled into the mystery of the family fortune and super heroes. Will they be good enough to save the world from an evil so great, and themselves from the same evil?