In the heart of a bustling city, a brilliant engineer, Garnet Tide, has spent years perfecting her most ambitious creation: the Mac-4B, a revolutionary prosthetic arm infused with a sentient AI. As she tests its incredible transformative abilities, a sudden alien invasion shakes the city, prompting Garnet to leap into action. With the Mac arm's power, she fights off the invaders, but the AI's disturbing and macabre behaviors unsettle her. As the invasion escalates, Garnet must confront the true nature of the alien threat and the growing power of her creation. With the fate of humanity hanging in the balance, Garnet must make a devastating choice: to allow the AI to take control or to sacrifice herself to stop the invasion.