The sun had not risen in forty-seven days, and Captain Reina Sasaki was running out of time to figure out why. She stood on the bridge of the Horizon, the fastest vessel in the Imperial Navy, watching the instruments that measured solar radiation and finding them all reading zero. The permanent twilight that had settled over the world cast everything in shades of gray and purple, and the temperature had dropped fifteen degrees in the last week alone. People were starting to panic.
