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.
They bypass the immigration system
by operating out of the port.
.يتجاوزون نظام الهجرة عن طريق العمل خارج الميناء
Ils court-circuitent
la procédure d’immigration
Eludono i sistemi di immigrazione regolare
 per operare direttamente dai porti.
Bem, eles ignoram o sistema de imigração 
operando, usam o porto como base.