TODAY-06012024 was June 1, 2024—the date Lena’s final, unsent message was logged. The 01-57 were minutes past midnight.

But to Mira, it was the last digital heartbeat of her sister, Lena.

It was a string that should have meant nothing: a batch code, a timestamp, a fragment of a filename from an old server backup.

Then she noticed the metadata flag: RECURSIVE LOOP DETECTED .