With the cast list, you would almost expect this to be another Chang Cheh film. Two of Chang's proteges, David Chiang and Chen Kuan-tai go head-to-head in The Imposter which sees cinematographer Pao Hsueh-li back in the director's chair. Chiang plays Ko Liang, as master of disguise who puts his seven faces to good use when he goes to the aid of two young guardsmen Tseng Yung (Danny Lee) and Tseng Kan (Wang Chung) who have been framed by Captain Lo (Chen Kuan-tai) for murder.
While serving time for insanity at a state mental hospital, implacable rabble-rouser, Randle Patrick McMurphy inspires his fellow patients to rebel against the authoritarian rule of head nurse, Mildred Ratched.
A newly arrived governor finds his province under the control of the corrupt Colonel Huerta. To avoid assassination by Huerta, he pretends to be weak and indecisive so Huerta will believe he poses no threat.