The file contained proof of an illegal, ongoing surveillance project hidden within the infrastructure of the old Soviet tunnels.
As she begins to decode it, Elena realizes the numbers are not currency, but geotags—coordinates—and the text corresponds to a list of decommissioned Cold War fallout shelters beneath the city [2]. 3. The Chase
The email contains a single, encrypted file attachment: CZ_840_349.txt .
Elena has to escape her apartment, realizing the 349 in the file name refers to a specific, hidden location under the Vltava River [4]. 4. The Revelation