Chloe, heiress of Titan Defense, fires chief architect Ethan Mason as a parasite, mistaking fake PhD Ethan Reed for the dark-web legend Zero-One. Mason joins Aegis, helps Samantha win a five-hundred-billion contract, and recalls his exiled team. Chloe and Reed rush Mason's unfinished mech project, but it fails publicly, three mechs self-destruct. Mason pilots Apex-01, splits into ten mechs, and crushes the swarm. Out of rage, Reed kidnaps Samantha, but Mason fights to save his woman. When Titan's stock hits zero, Reed finally gets exposed, Chloe's father begs Mason and is refused, Chloe regrets everything. But while Mason and Samantha announce their wedding, an aninterstellar monster opens eyes, a greater crisis is coming...
