Denji is a teenager who lives his life as a Devil Hunter.

Aiming to pay off the debt he inherited from his father, he starts hunting devils for the yakuza with his buddy Pochita, a "Chainsaw Devil", while living a tragically poor life.

Just when things seem like they couldn't get any worse, Denji gets betrayed and killed by the yakuza. As Denji starts passing out, he hears someone calling from inside his head...
And I want devil hunters...
...وأريد صائدي الشّياطين
… und was ich will, sind die Teufelsjäger.
Y lo que yo deseo es la muerte…
Y yo quiero a todos los devil hunters…
Et moi, ce que je demande,
c’est que les devil hunters…
E ciò che io desidero è che i Devil Hunter...
E eu quero que todos
os Caçadores de Demônios...
Ну а мне нужны охотники на демонов!