The Ugly Consort's Comeback Plan Ep. 4

Reborn as Molly, a noblewoman falsely accused of infidelity, she's poisoned by her husband's concubine. But when a modern-day scientist wakes up in Molly's body, everything changes. Armed with science and vengeance, Molly plans to take back control, divorcing the cold prince Yale and making everyone who betrayed her pay. With the Emperor and Empress on her side, she rises to power, leaving Yale and his concubine in ruin, no love, just victory.