 Alicia Huberman is a frivolous girl who loves drinks and men; her father was a German spy in USA and he has committed suicide in prison. Government agent Devlin asks the girl to spy on a group of her father s Nazi friends in Rio de Janeiro; this could be her chance to clean her guilty name. The girl falls in love with the agent, but he seems not to be attracted by the life she is living. Alicia accepts the duty and she goes to Brazil with Devlin. The agent suggests Alicia should marry the spy and gain free access into his house, so she does. During a party, Alicia and Devlin find some uranium dust hidden in Sebastian s canteen, but now he has discovered Alicia is a spy and he starts poisoning her day after day.