The daughter of one of the architects who built the Eiffel Tower gets framed for a murder that has taken place there, so she and her girlfriend embark on a quest across Paris to solve the mystery.

On the eve of World War II four Parisians cope with the impending invasion of their city by German forces. While the French government braces for impact, the intersected lives of a young writer, a vain movie star, a French politician and a young scientist are examined as they attempt to deal with war and evade German spies.