Excellent movie. This movie is about Japan's most famous tea master, Sen no Rikyu. Rikyu lived at the end of the 16th century and the end of the turbulent period of war, sengoku jidai. Rikyu became the tea master to the powerful national unifiers Oda Nobunaga and Toyotomi Hideyoshi. But Rikyu was not just a tea master, he also gained political influence as the confidant and cultural mentor to Hideyoshi.
Rikyu's relationship with Hideyoshi is one of the epic stories in Japanese history with a tragic ending. If you are not familiar with this historical time period or Sen no Rikyu then the movie may not interest you. But if you do, then it is a good movie to watch.