It was the year 3000. Following the Great Catastrophe, a cult leader has taken control of Korea and governed the country based on superstition. A new custom was introduced --- twins of different es were to marry as they were deemed to have married each other in the womb. However, Soojung does not like that she has to marry her twin brother, Taemin, as she is in love with Minho.  

Even if she's unwilling, she found herself trapped by fate.