Born with a genetic defect, 23-year-old agent Gaia lacks one of the most basic human instincts: fear. She works for an elite Special Investigations Unit (SIU) staffed with the finest young agents to infiltrate and apprehend society's dangerous new class of young criminals. While her partners Ryan and Harmony suspect she has a secret, they have no choice but to trust her. Whether her rare mutation is an important asset or a deadly liability for the unit remains to be seen.