Antek liked his room very much because he had lots of books, blocks and Edek the teddy bear in it. One rainy afternoon, when he was stacking blocks under his desk, he suddenly noticed something strange. Where there had always been a smooth wall, a tiny round door had appeared! They were no bigger than a school notebook and had a golden key in the lock. Antek hugged Edek tighter and called out quietly: - Edek, look! Where did this door come from? No one answered him, but the teddy bear seemed to smile under his moustache. Antek felt a tickle in his stomach - it was a mixture of curiosity and a bit of fear. He pulled out the key and slowly inserted it into the lock. Click! The door opened with a quiet creak. Behind the door was a hazy glow and a coloured light. Antek inched closer. Suddenly he heard someone whispering: - Shh... Just be quiet! What hides behind the secret door? Will Antek dare to look in there? What will happen when he crosses the threshold of the portal?....