Modern girl Shen Lianyi accidentally met a netizen who claimed to be the Son of Heaven of Great Jing. The two bantered and chatted across screens, and she also casually shared many novel ideas. After an unexpected event, Shen Lianyi came to the Great Jing Dynasty and discovered that her netizen Yuan You was indeed the reigning emperor. To adapt to her new life, she hid her identity and entered the palace, searching for a way home while helping those around her unravel the mysteries of the past. Living and sharing days together, the two went from probing each other to mutual trust, and also unexpectedly opened up a wonderful journey back and forth between ancient and modern times, thus unfolding a joyous romance spanning across time and space.