Inspired by Colleen Hoover's New Adult novel, "November 9." It all starts on July 7, 2014. K-pop idol Mark Tuan compliments Canadian university student Wendy Son at a karaoke place in Seoul. It is love at first voice for him. But with Wendy needing to return to Canada, they don't have the time nor the willpower for a long-distance relationship. So, Wendy proposes a solution: only meeting on July 7 of every year at the same time and at the same karaoke place without contacting each other. What exactly is the outcome of this when there are so many complications?