You are Carrina Marseille-O'Hara, a former Newtype ace pilot serving now as a Captain in the Colonial Transit Authority. Over the years since the end of the Zeon civil wars you've been sent to solve quite a few unusual problems, but none as complex or as outright mysterious as this one. After discovering a camouflaged starship adrift and abandoned deep in interstellar space you led your small crew to Mars in order to try and learn where the mystery ship had been built. You didn't find anything matching her descriptions in the registries on Mars, but your investigation did turn up evidence of conspiracy within the Royal Dockyards in Tithon City.
Not only did this end with you helping put down an attempted revolution aimed at overthrowing the legitimately-elected Queen of Mars, Mineva Lao Zabi, but it also revealed evidence of several illegal transfers of advanced technical knowledge regarding surface treatments of spacecraft and mobile suit armor. One such treatment allowed the mobile suits operated by the revolutionaries to leave behind afterimages composed of flaked metallic paint and waste heat, and the other was the highly-mirrored black finish you found on the abandoned ship's hull.
But that isn't evidence of who built the ship in question, or why: only that a lot more money and espionage were involved than you'd initially anticipated. Now it falls to you and your partner Rossweisse to find the shipyard where the Martian armor treatment was actually applied, and the party responsible for funding it.
The flight outbound from Mars itself is uneventful, until "morning" on the first full day of transit. That morning your squadron is forced to slow down for the first time in order to maneuver.
"Debris, out here?" you hear Anubis, one of your Martian escort pilots, muse. "Can't be war materiel, can it?"
"Negative," Rossweisse announces, highlighting a piece of debris for you on the HUD. "Look. ALICE, identify.”
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