The secret lover of the devil duke, the duke's maid.It's ridiculous.Because Eslyn was the princess of the empire who died by his hand!"Princess Eslyn, I brought you your poisoned cup."The face of the devil who told her to die is still vivid. But."My Esy, whom I love and respect. Your servant has come."Who on earth is that man who whispers sweet words of love?Eslyn could not become the lover of the man who killed her.That was also her last pride as a princess who dreamed of the throne.Will Eslyn be able to escape safely from that beast-like man who is strangely obsessed with the maid?What on earth can a princess who has become a maid do? More than that, was everything Eslyn knew the truth?