Chu Chen, Men Tingting and Liu Xuer are three good sisters who grew up together.
They spent their childhood laughing and cursing, walked through adolescence in a rebellious and hesitant way, and then entered college with their own thoughts and met all kinds of people.
They have different families, different experiences and encounters, but they are just the three most ordinary girls in the world. Perhaps in the eyes of others, they may not be any different.
But... When a series of things intertwined and happened to them, everything seemed to begin to change. The three feet of ice did not freeze overnight. Perhaps it was just the butterfly effect, which caused the fate of the three people to slowly deviate. What kind of story happened to them, and what kind of ending will each of them end up with?