The Oracion galaxies are the richest mineral resource in the universe, according to any space pirate you`ll run across. Thanks to modern robotics, freight ships moving through these galaxies are unmanned, and thus are easy prey for the pirates. The police have given up, forcing freight companies to hire outside help. One agency, the Private Guard Company, has a ship under it`s command that`s unique; piloted by 16-year old Li May Fong, the Angel Links roams the galaxy, exterminating pirates for free.