When Jack opened his eyes,

he looked a tree with white flowers, a wild stream and two ninjas through the window just like the open book.

Jack got to know that Annie and he were in Japan hundreds of years ago as he read the book.

While he read the book and maked a note where he was, The two ninjas looked up the tree house and found out Jack and Annie were there. They started to ran to the tree house.

Jack and Annie pulled the rope ladder into the house, so the ninjas would not able to climb up to them. But the ninjas climbed up to them like a cat without any sound.