Clara, 17, the older by four minutes, was tuning an out-of-tune acoustic guitar. Her hair was a dark curtain over her face. Juliette, 17, sat cross-legged on the mattress, staring directly into the lens of what looked like a early-2000s Handycam. She wasn't smiling. She wasn't frowning. She was waiting .

Léo hadn't noticed a camera shake. He re-opened the video, skipped to the last ten seconds.

A user named had uploaded a file to ok.ru a decade ago. No thumbnail. No description. Just the title: Les Sœurs Robin – répétition finale (2006) .

He didn’t have to. The final frame of the video was now a single word, burned into the screen in pixelated white letters: