Xin Tan has the ability to create happiness for others through sound, but after using it three times on the same person, his life will be bound to that person. Only when the other party is happy can Xin Tang can survive. Incidentally, Xin Tang rescued the school internet celebrity Ji Ze, who was about to commit suicide, and the two bound together.

A feisty foursome of 13 year old ballerinas and best friends is ready to move up to the next level. Tragedy strikes and their lives take very different turns. They end up dancing together again years later, not as planned though.