As a top killer in the Killer Employment Center, after being framed by her own aunt, she is caused to be pregnant by a stranger. Out of anger, she burns the house used to imprison her into ashes after she wakes up. Six years later, her baby is accidentally caught by the Dark Empire. In despair, she can only pretend to be a man and sneak into the Dark Empire to be a planted agent, which seems, however, to be the beginning of destiny...