Yan (Liang Yongqi), a college girl, has a crush on her senior (David). Yan once accidentally took an old walkie-talkie from the radio interest group. By chance, Yan got in touch with Jia Hui, a student who loves radio. They found that they went to the same university and met each other, but they acquiesced and never met again. Although they didn't meet, they were able to speak freely and became friendly bosom friends in the radio waves. An accident, Yan found that Jiahui's identity was not simple, which even affected Yan and her communication. ...