In this episode, we follow Harry, a newcomer to a mysterious community, as he discovers the dangers that lurk outside their walls. Ethan, explains the rules of the community and assigns Harry a job tending to the gardens. However, as Harry settles in, he is haunted by memories of his old life and the terrifying creature known as "Αυτός που χτυπάει" that roams outside. When the creature's tapping becomes more insistent, Harry is forced to confront his fears and the reality of the world he now inhabits. Along the way, Harry learns about the differences between his earth and the others in the community and how even the smallest details can have profound consequences.

Harry, who experiences a sudden deafening of all sound while walking at night, encounters a mysterious creature that disappears as soon as he sees it. Harry is plagued by nightmares and wakes up to find himself paralyzed in his own room, as the creature appears once again. He wakes up in a forest clearing and meets a man who warns him not to make any noise, as they are being hunted by creatures that are not human. The man takes Harry to a walled-off community where they are safe from the creatures