David meets a new friend, Elizabeth, and has to be careful not to reveal the true identity of the Catamans. But when he begins to share some of what he has learned, Elizabeth's father decides she should have the same teacher and leaves her to stay in Katmandu while he goes back to England. David surprises Elizabeth when he introduces her to Katy and the other Catamans. But soon she becomes accustomed to her new friends and begins her great adventure.