Doctor Palmer, a young English doctor wrongly accused of the murder of a British officer, is a prisoner of the Maharajah of Hasnabad. Doctor Palmer and Gopal, his devoted assistant, escape with the complicity of Amrita, in love with Palmer. But Palmer betrays her by finding Catherine, the wife of Governor Talbot. Amrita, jealous, delivers Palmer to the leader of the Thugs, a cult of worshipers of the goddess Kali. Warned by Gopal, Major Talbot intervenes and saves Palmer and Catherine from sacrifice. During the fight, Talbot and Amrita are killed. Palmer and Catherine finally admit their love.