He moved back to the command station and activated his navigation suite. He plotted a course deeper in-system, and fed the data to Ensign Lovell, the navigator.

“Captain,” Hikowa piped up. “Sensors paint a squadron of enemy fighters inbound. Looks like boarding craft are right behind them.”

“It was just a matter of time, Lieutenant.” He sighed. “We can’t hide here forever.”

The Pillar seemed to glide out of the shadow cast by the gas giant, and into bright sunlight.

Keyes’ eyes widened with surprise as the ship cleared the gas giant. He had expected to see a Covenant cruiser, Seraph fighters, or some other military threat.

He hadn’t expected to see the massive object floating in a Lagrange point between Threshold and its moon, Basis.

The construct was enormous – a ring-shaped object that shimmered and glowed with reflected starlight, like a jewel lit from within.

The outer surface was metallic and seemed to be engraved with deep geometric patterns. “Cortana,” Captain Keyes said. “Whatis that?”

A foot-high hologram faded into view above a small holopad near the captain’s station. Cortana – the ship’s powerful artificial intelligence – frowned as she activated the ship’s long-range detection gear. Long lines of digits scrolled across the sensor displays and rippled the length of Cortana’s “body” as well.

“The ring is ten thousand kilometers in diameter,” Cortana announced, “and twenty-two point three kilometers thick. Spectroscopic analysis is inconclusive, but patterns do not match any known Covenant materials, sir.”

Keyes nodded. The preliminary finding was interesting, very interesting, since Covenant ships had already been present when the Autumn dropped out of Slipspace and right into their laps. When he first saw the ring, Keyes had a sinking feeling that the construct was a large Covenant installation – one far beyond the scope of human engineering. The thought that the construct might also be beyond Covenant engineering held some small comfort.