In the city of Nivara, powered by the mysterious ruby core, the elite Mechanists thrive in luxury while the Scavengers struggle in the polluted depths. When the city’s ultimate defense, the Defender Titan, is destroyed in a suspicious explosion, rogue engineer Ren is framed for sabotage. On the run, she must uncover the truth behind the disaster and expose the Mechanists’ corruption.

As tensions between the classes rise, Ren clashes with her former best friend blade, now a loyal Mechanist soldier. Their conflict becomes a battle for the city’s future, where innovation, betrayal, and rebellion collide in a fight for survival.