A “Tri-River VIP” whose specialty is dying young. “I died again…” Sang Ra-hee-yo — the beloved only daughter of the Jade Emperor and the King of the Underworld, known as the Heavenly Princess — has everything in the world. Everything, that is, except her health. At the Tri-River of the Underworld, she crosses paths with a young imperial princess named Se-ru-hwa, whose fate is heartbreakingly tragic. Moved by her story, and acting in place of the girl who refuses to go on living, Hee-yo secretly sneaks away to the human world — without telling her divine parents. “Why are there so many humans trying to take a child’s life?!” The kingdom she arrives in — Un-guk, where Ru-hwa was sold off in marriage — is crawling with enemies. Not only are there factions plotting to kill Ru-hwa, but assassins are also lurking in the shadows targeting Cheon Gyeol-woo, the Crown Prince and Ru-hwa’s husband. “I can’t just stand by while villains bully a good child!”