Only the chosen warriors known as Vessels of Heroic Blood possess the ability to turn their own blood into weapons known as blood armaments.
First Chihiro, then his friend Kotetsu awaken as Vessels of Heroic Blood. And who are these people who keep transforming innocent people into monsters?!
The Vessels who awakened one after another throughout the course of a fierce battle are taken to Maldeus Church.
Once they arrive, the mysteriuos girl Dux has something to tell them...
Humans have an unidentified
 gene known as the Arcana gene.
لدى البشر مورِّثة غير معروفة 
اسمها مورّثة أركانا
Menschen besitzen ein unidentifiziertes Gen,
das als Arcana-Gen bezeichnet wird.
Los humanos
tienen un gen no identificado
Los humanos
tienen un gen no identificado
In un gene sconosciuto dell'essere umano
Humanos têm um gene não identificado
conhecido como o gene arcana.
У людей есть неопознанный ген,
который называют геном Арканы.