Feature version of the 1941 American serial film of the same name, made for export only, never shown in the USA in any medium, and evidently a lost film.
Jimmy Bancroft, a fighter pilot, who is recovering from injuries sustained during the Battle of Britain, and Hazel Court, a nurse, come across a pair of rare birds nestling in a field.
In Madrid, Spain, at the end of the 19th century, the young and reckless Basilio seems to be the only person who perceives the spectral presence of Professor Robinsón de Mantua, who begs him to take care of his niece Inés, because she is in grave danger.
When Bigshot Jones gives his unnamed dog to the All-For-One Club, Buckwheat quickly names the canine "Smallpox", inadvertently causing a city-wide panic.
Sgt. Rusty Curtis of the U.S. Cavalry is unhappy about the Army's plan to replace horses with tanks so, after a medical discharge, he tries to buy his old military mount Sireson.
Celebrated elderly Austrian poet opposes nazism, while his daughter admires and falls in love with leading nazi activist, who eventually becomes concentration camp commander with his father-in-law as prisoner.