Lucerito and his friends go on a crazy adventure: they steal a plane in Melilla and they land in the middle of the jungle, where they are met by a hostile indigenous tribe.
Pre-war intelligence man Tommy Blythe interrupts his honeymoon to investigate the discovery of vital Air Ministry blueprints on a woman killed in a London road accident.
Three mice run, cavort, sing and dance around in the stores and restaurants a big city at night. They wind up in a café for an early-morning snack and stocking up on food provisions before they return to the safety of their den beneath a man-hole cover in the street.
This film was mainly shot in the Japanese skiing resort Hokkaido in 1937-38 and was intended to create support for the coming winter olympics of 1940 in Japan which however were cancelled because of the Japanese-Chinese war.