What is the fine-grained topic of the following text: A gaggle of young hipsters formed an orderly queue at around 10.30 a.m., half an hour before opening time, as staff ferried boxes of stock and window dressers put the final touches on the store’s last ever window display — a quiet and enchanting affair featuring 25 species of butterfly fluttering in a mesh cage. Only return the topic.
Store opening with a butterfly-themed window display