2009. One year before Toma Saya and Sebumi Takeru met. Toma Saya has just returned to Japan after receiving training from the FBI and started working cold cases at the Public Security Bureau. Investigating a case in which high-level managers of an oil company mysteriously died because her heart was twisted by someone, Toma Saya met Ninomae Juichi, the enemy who will continue to challenge her and Sebumi Takeru. From here, she begins the story of SPEC.