Military possibilities thoroughly exploited for present day consumption. An espionage and sabotage case seems to center around the Maginot Line, with headquarters in an archeological expedition on the Breton coast. With the aid of an English actor-spy, and with Papa Pontivy using his instincts to the limit, they ferret out ciphers, identities, and organization and knock the plot galleywest. Hard not to feel that it is pretty unreal, in the face of actual events.