Chrollo along with 29 other people suddenly find themselves in a pitch black space with a floating blue crystal before them that claims to be the god of the world Istora.

All 30 people in the room are being summoned to Istora by the god for it’s amusement and as compensation for forcibly summoning them they will be awarded with an ability of their choosing along with a portion of it’s soul to which they can ask any questions they may have about the world.

Chrollo picks Light Manipulation as his ability and is whisked off into Istora, So begins the story of Chrollo the so called Hero Of Light who has a dark shadow.