Hera went home to work in her laboratory to find out what kind of poison Milda gave Elsa and create an antidote. She didn't sleep and kept researching and testing the whole night. Spending time as a doctor in Novus, Nathan was able to help her with her research.
They took turns in testing samples in the lab. Hera would read her grandmother's notes whenever Nathan asked her to rest. Not only that she's trying to find an antidote for her daughter. She's also trying to find Chris a cure. She wanted to save them both.
It was already dawn when they came up with the answer and decided to go back right away to the castle with both good and bad news.
"Where is King Christopher?" Hera asked the chamberlain who welcomed them upon their arrival.
"His Majesty is in his quarters, still sleeping, Your Highness," the chamberlain replied after bowing low.