Ja-young and her friends decide to shoot a video titled “Spirit Summoning That Tells You Everything” for a YouTube contest with a cash prize. Initially planning to stage the whole event as fiction, they begin filming in the water tank of a…

　　在咖啡店打工的多恩和出道5年的爱豆金星，长相一模一样的两人在偶然的情况下遇见了。在仅有7天的时间里互相交换身份，两个女孩在这一周之间又会遇到甚么样的罗曼史呢？