A stand-alone sequel to the original Neo video game, Neo Z does take place in the same universe, though this entry takes place elsewhere in a different planet...! On the planet Atlis, Kim Moon-Hee, a young, 19-year-old Ominese (Korean) girl who meets Wire, a rejected robot with, if not, many abilities. The robot tells her that she was from supersoldier force, TETRO, who are known for having a lot of supersoldiers (called the NEOs) that protects the planet from the EXVISION, vicious and savage monster aliens from a wasteland-like planet called DITURE.

Wire was made from a random generator to make one user filled with hyperactive energy and summon alot of things. TETRO finds it a threat and throws Wire away. Without it, the supersoldier force struggles to fight against the EXVISIONs, who are planning on making a giant space tyrant called KRONOS, in hopes of destroying the planet. TETRO even tries to make plenty of spaceships to enter their world without any harm, but fails.

After some thinking, Kim uses Wire to turn her into a NEO. Her clothes are swapped with a silver skin-tight armor that has rose and aqua lights and details. She has the power of Zeal, which grants her impressive energetic powers, as well as summoning weapons and vehicles such as the TETRO Splinter (a chainsaw), the TETRO Rapider (a SMG), the TETRO Hedgehog (a floating vehicle), and so many more. Anything she touches will be stored inside Wire, who gives her these amazing abilities.

Kim Moon-Hee must do whatever it takes to save planet Atlis, defeat the EXVISION for TETRO, find a spaceship, and destroy their home planet DITURE, in order to free wotanity and TETRO from this never-ending space conflict.