Devastated by the death of his entire family, Keyller vowed to take the enemy down and take his retribution. He entered the underground group, Foedus, and sought alliance. Now he is mighty enough to slaughter those who wronged him. No one can stop him... that's what he thinks. When it was time to execute the well-crafted plan, Keyller was halted by the truth of the killer's identity. A person who was close to him. A blood relative, his mother...