Hideyoshi, as the great unifier of Japan, is throwing a tea party to showcase Japan’s superior culture and everyone’s invited.
Date Masamune, being one of the lone holdouts to Hideyoshi, isn’t going but wishes he could. One person that does go is, of course, our main character Sasuke.
Where, no surprise, he sees something he wants.
Coveting isn’t the only thing Sasuke does at Hideyoshi’s tea party; he also is scheming to make sure his take on the tea ceremony is the most visited and talked about.