All Men Are Brothers S01 E07 Episode 7

Lin Chong meets a sword peddler and in a stroke of luck, purchases a valuable sword. The High Marshal, fearing his martial prowess, pretends to cosy up to him by punishing his son, and invites him to the residence for a banquet. When Lin Chong brings his sword into the White Tiger hall, which is forbidden, he is captured and sentence to death.