Staying up late and working overtime and taking medicine made me, who was originally in the 21st century, travel to the body of a princess from an unknown dynasty. At first, I just wanted to leave this world that did not belong to me. However, my escape failed, so I tried to find a way to leave. Sacrificing their own lives to save each other strengthened their belief in being together. Later, they discovered that there was something fishy about the death of the original owner, so they could take the opportunity to travel to this unknown dynasty. In order to be responsible for the original owner, they also had to follow the clues to find the culprit and kill him. As a result, the more they knew, the colder they became. I didn't expect that the person who poisoned me would be my own relatives. Why did you kill me? A bigger conspiracy surfaced.
Concept: Unexpected time travel, change of identity, and the need to make a choice between love in home country.