 The FBI, investigating the theft of plans for a new cobalt bomb, comes across a Communist spy ring. One of its members is Juliet Sinclair, who runs an Asian orphanage and also an operative for Red China. She is flying to Los Angeles to take a girl from the orphanage to a couple, the Kenyons. The girl, however, the night before the trip, discovers Juliet Sinclair s secret. What the girl doesn t know is the Kenyons are part of the same spy ring. Erskine and Rhodes must not only recover the missing information but also are in a race to prevent the girl from being liquidated by the Kenyons.