"I've never understood why people fear the number eight. It's a complete cycle, a circle of devotion. To the world, the marks on their skin are scars; to us, they are signatures of worthiness." To the FBl's elite "Natural" unit, the pattern is a nightmare: eight bodies, every three months, marked with an S and executed with ritualistic precision. Kalani feels the echoes of their terror; Vex hears the final thoughts of the dying; Kimmy sees the sheer force used to break them.