Hazuki Family's maid Ine hands a letter to Ryo, who is restless from his Father's death. The letter was sent from a person named "Yuanda Zhu" to his father which contained characters he cannot read. Ryo begins investigating the letter to find out his Father's past. As he further investigates, he is targeted by "Mad Angels", the gang that runs Yokosuka Harbor's underground business.
From the name, I'm guessing that he's involved
in the Chinese underworld somehow.
على حسب ذلك الاسم، فأعتقد أنه متورّط 
.مع العالم السفلي الصينيّ
Aber aufgrund seines Namens vermute ich,
Pero, a juzgar por el nombre,
Pero, a juzgar por el nombre,
Mais d’après son nom, je devine
A giudicare dal nome, mi viene da pensare
 che possa far parte della malavita cinese.
Pelo nome, acho que ele está envolvido 
no submundo chinês de alguma forma.
Но, судя по его имени,