Chan, in Paris for a reunion with friends from World War I, becomes involved in investigating the murder of a munitions manufacturer who was supplying arms to the enemy, even as the rising clouds of World War II force the city into nightly blackout status..

• 20th Century Fox
• Sidney Toler
• Harold Huber
• Pedro de Cordoba
• Lynn Bari
• Richard Clarke
• Dorothy Tree
• Noel Madison
• Leo G. Carroll