SPEC: Zero

2009. One year before Toma Saya and Sebumi Takeru met. Toma Saya has just returned to Japan after receiving training by the FBI and started to work unsolved cases in the Public Security Bureau. When investigating a case in which high-level mangers of a Petroleum enterprise mysteriously dying from their heart being twisted by someone, Toma Saya met Ninomae Juichi, the enemy who will continue to challenge her and Sebumi Takeru. From here, the story of SPEC begins..