The flamboyant and fashionable Ning Ning (), the youthful and free-spirited Liu Dan () and the intelligent and sweet Liang (Qi Zhongyang) met by chance in a karaoke bar. * * * Some of them have different personalities and the same interest in music, which makes them become three sisters and form the "Blue Fox" beautiful girl group. Under the guidance of the devil coach Xia Tian (Zhao Chunyang), the "Blue Fox" three sisters are maturing. However, the weather is unpredictable. Ning Ning doesn't understand the divorce between her father Ning Feng (Liu Peiqi) and her mother. She is different from others. Father went bankrupt and committed suicide overnight, and Liu Dan wanted to become a monk. Liang, who escaped from marriage, was kidnapped by her fiance in the rehearsal field. The "Blue Fox" combination faces disintegration again and again. Ning Feng, who deeply blamed herself, resigned from her thriving career and came to her daughter to compensate for her love. He touched the "Blue Fox" three sisters with his heart and became their father. Under the care of Ning Feng and summer training, the "Blue Fox Group" became popular all over the city in a music competition. However, their competitors set them up and disqualified them. But the summer she just fell in love with was disabled and disappeared. At the most critical moment of blue fox, a southern boss took a fancy to Liang and was only willing to take her away to the south for development. Liang, who waited for the opportunity, decided to leave the blue fox, and the blue fox was dissolved from then on. And she loves summer and has been worried about it. Under his threat, Ning Feng finally told her the whereabouts of Xia, and she went to find Xia. Finally, Ningning found him in a rural primary school, but his feet were disabled. When she played Farewell, she looked back at summer. When she saw that she was Ningning, she miraculously stood up and they hugged each other. ...