Albert finished his history assignment, ready to find some books to read at his father's room.
While he is search for books, he finds a door behinds the bookcase. At this moment, his sister Alberta come back to the home. She asks him what he is doing. Albert is thinking about whether to tell her or not. Finally, his curiosity drives he tell her the truth.
They move those bookcases away and to open the door. Inside of the door is like another world without any light and living things. Then they decide to enter the door and see what happened in there.
Inside of the door is completely dark, without any light and voice. They their phones to light the ground, then carefully down to the steps. He don't know how long he had gone, just when he wants to give up the exploring, he found something on the wall! He approaches to the wall, sees carefully. "Paintings on the wall, this is mural!"
Those murals show a story. 'A million years ago, there was an island and thousands of species living in there. One day, the island is dramatically changed. None of living things could survive, so they request the god to help them. God said that if they want to survive, they must pay the price for survive. They accepted, so they become human and no longer than 50 years. And only one person in each generation could inherit a feature from their ancestor.
He is one of them, and his sister inherits the speed from their ancestor—leopard.' "Is it the truth?" He mumbled. When he was shocked by the contents of the mural, a person stood silently behind him.