The strongest hero Raul defeated the demon king, and should have become the saviour of the world. Instead, his companions and family were killed by power hungry aristocrats. Raul himself had false charges brought against him by the princess and was executed. Moments before his death, his heart fell into darkness. He vowed to have his revenge on the traitors, to make them suffer for the suffering they caused him. With the power of darkness, Raul was revived, ready for his revenge.