This book is all about an adventurous girl named Addison, along with her friends, follows the incredible experiences of going on missions in a mysterious mansion in the forest. They have a lot of people with the first name initials' "M" and they went to an enchanted cave Entitled the Cave of Wonders. Inside the cave, they came across a room with green light. They also encounter many strange events during this mysterious journey, so join Addison and her friends on this epic journey to Avalonia.