I was not impressed by the previous translation of the synopsis so I made my own attempt at it. However there are still parts that I found impossible to translate into English effectively, so I simply skipped those parts. For reference, here is the old translation from Mystic Crescent. If anyone is curios and want to take another shot, the original Chinese is:

闪耀的星光，华丽的舞台！在歌声中滋生友情，在舞蹈中划出未来，少女的梦想开始启程！ 一位天后因丑闻陨落，背后竟埋藏惊天阴谋。 一对情比金坚的挚友，因命运弄人分隔两地。 少女为帮母昭雪，毅然踏上选秀之路。 当夜曲成为星光闪烁的序章，她将以歌声捍卫尊严。 阳光少女独自前行，为履约定踏上星途。 当舞台成为没有硝烟的战场，她将以歌声追逐梦想。