Oleg, a young boy, is spending his summer evening helping his mother in the library near their home. While reshelving books, Oleg hears a strange noise coming from a narrow passageway between the shelves. Curious, he investigates and discovers something unexpected.
The document describes a conversation between a boy named Antonio and two archaeologists at an archaeological dig site. The archaeologists are debating the age of the ancient ruins they have found. One archaeologist argues the ruins are 2,500 years old based on evidence from the dig, while the other maintains that written historical sources date the city's founding to less than 2,000 years ago. Antonio is surprised by their disagreement over what seems a minor difference in dates to him.
