Oppio!

Mister Morgan’s traveling theater is used by the owner’s unfaithful wife and by her lover, the sweetheart of the company, to circulate the opium brought into America by Wuang Ching’s tong: a dirty traffic which Tex and Carson investigate. A wicked member of the group has discovered everything and in order to get a big slice of the substantial pie of profits, puts real bullets in a stage gun. And thus Morgan, who knew about and suffered from his wife’s adulterous affairs, kills his rival during a play!