Detective Dupin is very smart. He helps the queen. A letter is stolen. The queen is sad. The letter is important. The police search for the letter. They look everywhere. They cannot find it.

Dupin thinks. He goes to the minister's house. The minister is not nice. Dupin looks at the room. He sees the letter. The letter is in plain sight. It is on the table. Dupin takes the letter. He gives it to the queen. The queen is happy. Dupin solves the case.