Like the previous volume, this one is dominated by Shizuku with only a brief (but significant) Issei appearence.
Shizuku continues his quest to better understand his father. He stays in Bordeaux and continues building his understanding of wine.
When he finally returns to Japan, he learns that Taiyo Beer is likely joining forces with another company. Because the other company has an established wine division, Shizuku and his coworkers are concerned that the merger will eliminate their fledgling wine concern.
It all leads to a blind tasting competition focusing on affordable sparkling wines which is judged, obviously, by famous wine critic, Issei.