After the outbreak of war, the world became ruins, the battlefield is out of order, enemies and troubles are everywhere, only the bare land left. At this crunch time, A group of "bounty hunters" appear healing the world, safeguarding fairness and justice.
The story begins with the robbery of the Departure Town. And now you are one of the soldiers, you follow the supporting hunter Erica, learn to be strong enough to play a full part in fight. However, the real plot is just the tip of the iceberg when you uncover the mystery, kill the guy behind the robbers afterwards.