The new kid's arrival at school causes a stir. Not only is he immaculately and stylishly dressed, but he arrives in a Humvee limousine with two armed guards who stay with him all day. Alice, C.J., Casey and Ben, a young American who is also a new arrival get to meet Yuri and they all become friends. But then Yuri and Casey are kidnapped from a party and the complexity of the situation increases dramatically. It turns out that Ben's parents are CIA agents and they are somehow connected with the case. And why are the Australian Federal Police involved? And just who is Yuri Kirilenko? All the friends display great courage and resourcefulness as they struggle to solve the mystery of Yuri Kirilenko and free him and Casey from the grip of a mysterious European group.