Shin Suigokyu, connoisseur of fruits, travels all across the world in search of the most exotic ones. Through his research, he comes to find a particular type of fruit called a yuzu, leading him to Japan, where the sweet citrus is found. In every fruit he has collected, only the ripest of ones would he take.

One day, walking through a market in Tokyo, he comes across a lady who vends fruit and happens to sell yuzus. Unsatisfied with the selection, he starts his leave, but not before being taken to discover where the first Yuzu tree was born; leading him to uncover his role in a secret about the fruit that has the potential to change the world forever.