SMALL HOUSE, ISOLATED VILLAGE.
Prince Asher has been transferring the cure that was stolen from the Silver Palace to his patient, who has the same illness as Duchess Hermine, and right now, his patient seems to be getting a positive response. What's left is waiting for his patient to wake up from his comatose state, and only then will L help him to fully implement his big plan.
Asher then stared at his patient, who got this mysterious disease because of his master. His master, Professor Anton, apparently used the person in front of him as a test for the poison that this person received without coercion because he desperately needed money.
However, his master never had any goal to begin or end with. He's just a maniac doctor who loves to use his brain to create his 'masterpiece.' Each time he kills someone with his 'medicine,' he will feel 'full' because of it. His victims also turn out to be random. His clients who need his services are often criminals.