Grey Trace is a simple mechanic in a technologically advanced world. He asks his wife, Asha, who is an employee for a tech company, to help him return a refurbished car to his client, Eron Keen. Eron is a renowned tech innovator, and when the two of them visit him, he unveils his latest creation: STEM – a multipurpose chip with nearly unlimited potential. On the way home, Grey and Asha’s self-driving car malfunctions and crashes. Four men accost the couple, killing Asha and shooting Grey through the neck, severing his spinal cord. Left quadriplegic and in the care of his mother, Pamela, Grey sinks into a depression. Aron visits Grey shortly thereafter, promising that STEM may allow him to walk again.