Koko Hekmatyar, a young arms dealer sells weapons under HCLI, a shipping corporation. As one of the company's unofficial weapon sellers, she secretly sells weapons in many countries while avoiding the local authorities and law enforcements as most of her work is actually illegal under international law. Travelling with her is her team of bodyguards who are mostly composed of ex-military veterans.

Her latest addition to the crew is Jonah, a seemingly emotionless child soldier who is skilled in combat yet ironically hates arms dealers. Jonah joins Koko as he wishes to find the arms dealer responsible for his family's death. What follows is Koko and her crews escapades around the world.