Aria, a hero of interstellar warfare, is the sole certified pilot of the Federation’s most powerful mech, the “Iron Vow.” For years, she has cleared deep-space threats for the Valock Group—the mining empire owned by her husband Damian’s family—and conquered 300 resource planets. Upon returning from the front lines one day, she caught her husband Damian having an affair with AI engineer Nova in the cockpit, and their marriage fell apart. Damian and Nova jointly submitted a proposal for a replacement pilot in an attempt to seize the mech, and Nova even deliberately smashed the AI core left behind by Aria’s late parents. Her son Liam chose to side with his father, and her mother-in-law, Sera, publicly slapped her, forcing her to act as the family’s lackey. Faced with these successive betrayals, Aria decisively filed for divorce. At a grave on Mars, Aria reunited with Marcus, the Expeditionary Force marshal she had saved on an alien battlefield eight years earlier. Marcus had been secretly watching over her all these years, mistakenly believing her marriage was happy and never disturbing her. When Sera was kidnapped by interstellar pirates and the Corporation had no way to rescue her, Aria—in order to secure a divorce from Damian—publicly dialed Marcus’s number. The very next second, a Titan-class flagship of the Expeditionary Force, accompanied by hundreds of warships, jumped into the skies above the Corporation headquarters, and Marcus arrived with his entire fleet to back her up.