The Banos has exploded and sunk at sea, but another freighter, also called the Banos, is now loading at a South American port, under the command of a man known as ‘Captain Scarface’. On shore at the Los Rios Hotel, a number of passengers are waiting to board the ship. Sam Wilton is in trouble, and needs to get back to the USA quickly. Ilse Yeager is waiting to be reunited with her father, who arrives with Mr. Kroll, an associate of Captain Scarface. A man named Clegg, who has just completed some work for the captain, also arrives and demands money from Kroll. Meanwhile, the captain is expecting Dr. Yeager, whom he plans to force into helping him on a mission of destruction.
In post-world-war II Germany, Dutchman Simon Van Halder is accused of killing a British soldier. Although he confessed to the murder in order to obtain penicillin for his illness, Simon is innocent. During the final days of the war, Simon and three other men tried to steal penicillin, from a British Army outpost, for sale on the black market. During the robbery, a British guard got killed. Simon was captured and he initially refused to incriminate himself. However, Simon’s accomplices told him that his girlfriend, Anna DeBurg, died. With nothing to lose, Simon agreed to falsely-confess to the murder of the British soldier in order to save the others and also to receive antibiotics for his illness. The military authorities convict him and sentence him to life in prison. During his transport by train to a central prison, Simon tries to escape. His escape fails and he ends up in the prison hospital where he recovers from his illness. While convalescing, a bewildered Simon is shocked to