A mixed party of West Indian settlers arrives in London, where they encounter prejudice from the white population and integrate themselves into the existing West Indian community.
While perusing the books of an engineering company, fastidious auditor Frank Manning encounters rum goings on when he is approached by a woman who claiming she is being blackmailed. She begs him to find certain letters and he eventually agrees. Having obtained the letters, he takes them to a specified address where, to his horror, he finds a man, fully clothed, dead in the bath.
Theodore, un ingeniero aeronáutico, debe someter a revisión un avión de su compañía. Después de examinarlo, detecta un cierto desgaste de los materiales que implicaría un riesgo lo bastante alto como para que le parezca oportuno advertir a la tripulación de un aparato que se encuentra en pleno vuelo.
