Her boss, Kevin, hovered behind her. Kevin didn’t know a packet from a pizza box, but he knew how to look worried. "Is it the backbone again?"

Maya unplugged the orange-and-black SSD and placed it back in her bag. She closed the lid of her laptop.

"No," Maya said, opening her worn leather laptop bag. "It’s worse. It’s subtle . Something is eating the ARP tables one by one."

Maya leaned forward. "There you are, you little ghost."

"That's impossible," Kevin breathed.