Darker than Black

When an explosion is set up to steal a meteor fragment from PANDORA headquarters, Hei is sent it to steal it before anyone else does. On his first day he meets up Corinna Moku, who breaks down not long after arriving at the gate, and Meena Kandaswamy, who is from the same organization as Hei and will be helping him find the fragment. Now Hei must keep from being detected as a Contractor and find the meteor fragment. But will a death at the headquarters break his cover?