The unexpected business trip arranged by Jake Sim, Jay Park and Ethan Lee, is demanded by the tycoon's granddaughter, Ellie Lee. Lauren Yang, the CEO of JYL Co, a company that hosts an annual event every year, once got a wedding proposal from Ethan Lee, the tycoon's grandson. She wasn't expecting him to propose in front of her employees. How can she face Ethan Lee on this business trip? Will she finally accept his proposal? Can Ellie, Ethan's sister, help Lauren overcome this fear? or not? Let us uncover the love story of Ethan Lee and Lauren Yang as we dive through their life.