A British secret agent in Germany takes a job as the assistant to an elderly lighthouse keeper, planning to make his escape with some valuable documents when a British boat arrives to pick them up.
James Mason as a private detective, whose father is a Scotland Yard man, takes a case involving extortion and kidnapping. A young girl is kidnapped from a nursing home and he advises the girl's father not to pay the ransom. After several near-misses on his life, he learns that the doctor in charge of the nursing home has been taken prisoner by the kidnappers. And then the wicke...
