Oppio!

Mister Morgan's traveling theater is used by the master's unfaithful wife and her lover, the handsome man of the company, to circulate the opium introduced into America by Wuang Ching's tong: a dirty trade, which Tex and Carson investigate. An evil member of the group has discovered everything and, to get a big slice of the substantial profit pie, puts real bullets in a prop revolver. And so Morgan, who knew and suffered from his wife's adulterous affairs, kills his rival during a performance!