Another world exists beyond the one that humans can see–a world
populated by demons. For centuries, demons have crossed into our world,
some looking for a new life, adventure, or just a job. But many are
intent on causing chaos and destruction, feasting on human flesh and
fear. A tenuous Peace Treaty is the only barrier between the worlds, the only thing protecting humankind from utter devastation.
Every
hundred years the Treaty must be renewed — and the time for that secret
ceremony is at hand. Violent demonic splinter factions that are
hell-bent on destroying the ancient pact are preparing to assassinate a
key figure who is vital to the signing ceremony.
Enter the Black Guard, a secret police force that protects the boundary between the
dark world and our own. It's the job of two Black Guard agents — Makie, a
gorgeous demon, and Taki, a hard-boiled human — to form an unlikely
partnership, stop the assassination, and avert an all-out war. But to
save both their worlds, they must risk not only their lives, but their
very souls!