Jisung is a full time café barista, best known not only for his wonderful works of latte art, but also for the calming effect of his drinks. You see, Jisung really isn't your average barista.
Han Jisung is a professional swimmer, who trains for his sport daily. One day he meets a new but mysterious life-guard, Lee Minho. Even if Jisung doesn't like him at all, he continues to interact with him, not knowing they both are solutions for each other. Meanwhile they don't know that they are stuck in a case...