A girl called Sana realised there were two group chats. One was the normal friend chat that everyone, including a girl called Mei, was in. The other was the same group — minus Mei — where people said what they really thought about her, screenshotted her messages, and laughed. In the main chat, everyone was friendly to Mei's face. In the second, they weren't. Sana was in both. She didn't start the second chat and didn't say much in it, but she was there, reading, a part of the room where her friend was being talked about behind a wall she couldn't see. Two chats, two faces, and Sana standing in the gap between them.