ChiSai chronicles the life of young Shy Stevens, an 18 year girl whose life was torn apart in every way imaginable, yet she dedicates herself to crawling from the wreckage and settling the score. Armed with deadly training and a special woven bulletproof uniform, she resurfaces to put her life on the line for one shot at fulfilling her life's mission. But once she's rebuilt her life and goes about getting revenge on her tormentors, she faces risking her new life and family to settle her old scores.