Polly sees a door. The door is big. Polly is with friends. Polly looks at the door. Polly sees small marks. The marks are old. Polly knows a story. The story is about a key. Polly tells her friends. The key is in moonlight. Leila and Omar listen. They understand the story. They look for the key. Polly leads the way. They go to a yard. The moon is bright. The moon shows a hole. Leila puts her hand. Leila finds a key. The key is old. They go to the door. The key fits the door. The door opens slow. Inside is a room. The room has old things. They see a big treasure. The treasure is from Sultan Malik.