Wang He Di seems to be an ordinary heir but he secretly owns a cafe "The Hideout" that is actually a secret organization in disguise. Meanwhile, a girl named Shen Yue joins the cafe as a part-timer. She also seemed to be modest and simple, but she hides her pains in the deepest part of her heart. The cafe is being managed by Kuan Hong, He Di's close friend who is also aware of the organization. What happens next?