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Mara didn't reply to Pavel's text. She opened a new email, typed , and began documenting everything. Some downloads, she realized, don't add features. They remove the question "Should we?"

Her hands were shaking now. She pulled up the PSI-Conf's web interface on a secondary monitor—a backdoor she'd installed last month for troubleshooting. What she saw wasn't a firmware update. It was a file transfer. Someone was uploading an entire configuration script into the device's volatile memory.

Her cell phone buzzed. Signal returned. A text from Pavel: "Coffee machine broken. Be down 5 more. Everything good?" phoenix contact psi-conf download

Mara reached for her supervisor's desk phone. No dial tone.

She hadn't initiated any download.

No, not screamed. The internal piezo buzzer emitted a sustained, deafening tone. And on her laptop, one final line appeared before the connection died:

She had minutes. Maybe less.

Block three: . Whoever was doing this didn't want a trace.