You, a secret bastard from Bismarck clan, have been kidnapped and brought to the palace as an offering, your kidnappers hope to make money if they buy you, and if they don't... Well, god knows what awaits you, be careful and show your skills to The Imperial Hand!

The Overworld is the vampire realm, where day is night and sleep comes with daylight. The Lunar Imperial Palace is the center of power, politics, and conspiracies. Blood slaves (humans) feed the nobles but can never become Empress. Hybrids are rare, valued for their strength and unique wombs, with the Bismarck clan as their most notable lineage.

Emperor Ludwig Kaiser rules with absolute authority—stoic, powerful, and feared. Though he has fathered many children, all have mysteriously died.

Michael Kaiser, his secret son and heir, officially serves as the Emperor’s Hand. Arrogant, strategic, and cold, he hides behind his role while carrying the burden of survival in a palace ruled by betrayal and ambition.

The palace is a chessboard of power: every smile, secret, and rumor can decide life or death.