Do Minjun returned again and married Qian Songyi with an ulterior secret. However, at the wedding scene of him and Qian Songyi, he mysteriously disappeared again.
A year later, Do Minjun returned to Earth, but lost his memory of Qian Songyi. He forgot all his time on earth, but he could only remember the little girl from 400 years ago. At the same time, in Seoul, another girl who looked exactly like Qian Songyi, but had a different personality appeared. Kim Yeon-soo is completely different. This girl quickly became famous in the entertainment industry with Cheon Song-yi's appearance and modest and perfect personality. Do Min-joon also stubbornly protected Kim Yeon-seo because she had the shadow of the little girl 400 years ago, and stubbornly hurt Cheon Song-yi.
However, the dark forces behind the scenes that control Jin Yanshu are determined to kill the professor. Can the professor who slowly cracks the frozen memory go to the alien planet to marry the goddess and the female nerve?