The World’s Most Poisonous Beast

An Jinsu, the illegitimate daughter of the Taishi family, deeply loved the Fifth Prince Baek Seung-taek in her previous life.

To help him ascend the throne, she betrayed her husband, Sangwan Yong.

But after Baek Seung-taek became emperor, he abandoned her, and she met a miserable death in an old grave in the wilderness.

After death, her soul went up to Wangxiang Terrace in the underworld, where she learned that in the human world, only Sangwan Yong was mourning her.

As she recalled everything from her previous life one by one, she regretted the past.

Unexpectedly, she was then chosen by Meng Po at Naihe Bridge and sent back to the human world to live a new life once more.

After her rebirth, An Jinsu married Sangwan Yong as she had wished.

But because of her beauty, she caught the eye of Emperor Sejong Baek Seung-yo, who had come to visit the Taishi residence.

The emperor could not seize a minister's wife, but Sejong was dissatisfied with Sangwan Yong.

Just then, foreign invaders attacked the border.

The day after Sejong, Sangwan Yong, and An Jinsu were married, Sejong ordered Sangwan Yong to lead an expedition.

So the newlyweds were separated....