Sawa, orphaned as a child by murderous thugs, now targets the scourge of society as a trained killer for a mercenary syndicate. Coquettish and capable of unimaginable violence, she's grown into the perfect weapon — but doubt takes hold in Sawa's mind when her fellow assassin, Oburi, decides he wants out.

Years after the events that transpired in Kite, Sawa's whereabouts are a mystery. During this time, rumors of a new killer have begun to circulate the city. They call her the Angel of Death, an unfeeling assassin who eliminates her targets with grace and precision, leaving only a flurry of feathers as her calling card. What the public is unaware of is the fact that this notorious hitman is a polite young lady named Monaka. Like her spiritual predecessor, Monaka has lost most of her family, and her father's duty as an astronaut keeps him practically worlds apart. However, they are close despite the physical distances and Orudo promised his daughter that he would return. Until then, daily life for the timid and somewhat clumsy Monaka involves mostly school and her part time job as a waitress, but her nature completely changes once she receives an assignment.