I have a secret that must not be told. I only have one friend, but unfortunately, no one knows that I have such a friend... Gradually, I find that I don't seem to have much affection, but they appear - the tragic Yu Lianxiang, the mysterious forensic "cousin" Yin Shanglin, the ambiguous head teacher Jiang Chen, and the pretentious Sister-in-law Li. Our encounters are destined in our past lives, but we don't know...