Chen Jin, a 23-year-old girl, was depressed and smileless all day long because of the departure of her colleague Li Chengjin, who she had a crush on for half a year. With the encouragement of her friends, she decided to give herself half a month of vacation to forget the depression in her heart through fun. Therefore, Chen Jin gave up three things for the first time in half a year. The boring working life on the front line began her journey to the ancient city of Moling. However, under the guidance of someone else, when she was playing in the main hall of Xiaoling Mausoleum of the Ming Dynasty, she accidentally opened a door covered with spider silk and dust, and thus began a dream 600 years ago...