The twins Mary and Cary set out to visit their father, a missionary in China who has wired them to tell them to come and see him because he is ill. The girls take off with the assistance of Abdul Mousad who has interjected himself into the lives of the twins. Abdul works for Mohammad Chu the head of Al Queda in the Far East. Chu's plans are interrupted when Cary in a narcotic rant pushes Mary from the ship. Mary survives and is found by John Doss who she slowly falls in love with. Cary, however, falls in with a group of cutthroats who treat her horribly. Eventually the twins discover the truth about where the other may be, and are subsequently reunited and learn they have been used to help smuggle a nuclear bomb to America. It is w up to them and the police to find out where the nuclear bomb is and help try to stop it.