Moving to a new area is hard for any 10-year-old boy. It means fitting in at a new school, living in a new house and, of course, making new friends. But Robbie manages to deal with all of this by building a den in whatever place he moves to.
This time though, Robbie discovers that his den poses some strange magical power. The badly put together pile of twigs can transform people into anything it wants to! From cops and robbers to Trojan Warriors, if you walk into the den, there is no telling who you may become when you walk out the other side.