When Da Ge Tou was unhappy that his sister was moving out, he found out that someone had been following him. Unexpectedly, the follower was a single-eyelid girl who looked like his sister. More surprisingly, not only did the single-eyelid girl look like his sister, he even heard someone called her “Zi Ting”. Even her name was same as his sister! Is such coincidence possible? Who was this mysterious single-eyelid girl? Why was she following Da Ge Tou?