Xue Hua (Snow), Huo Hua (Fire), Lang Hua (Water), and Yan Hua (Fog) are four childhood friends, bonded by their musical talents and a promise to never be separated. However, they are adopted into different families, scattering their paths.
Sixteen years later, Ye Fan (formerly known as Huo Hua) hears that Xue Hua, now a singer called Angel in France, is suspected dead, with her ex-boyfriend and Music Academy principal, Qi Yuan,
