Rita Estelle knows that Duke Erwan Cereus will fall ill and die, leading to a bloody rebellion. She knows this because she would've died in that rebellion had it not been for a kindly sorceress who sent her back in time. With her second chance at life, Rita seeks to use her medical genius to get close to Duke Erwan as a child and cure him. But the closer she grows to him, the more she suspects his sickness is caused by foul play. Can Rita save Erwan and the whole country before it's too late?

When the duke, who was in poor condition, suddenly died, the land fell into the hands of the rebels. In a short time, the rebellion was suppressed by the royal family, but… The point is that I, Lise Estelle, will be hanged for treason. “It’s not fair!” I’m simply the best doctor in the area. If that’s the case, I’ll become the duke’s doctor this time so there’s no rebellion, and I’ll make the duke’s heir healthy! “No one cares about you as much as I do. Therefore, you must definitely listen to me!"