Herr Pierre Van Groot owns two barges. Van Groot, his wife, and his sister-in-law navigate along the north channels between Belgium and . Herr Pierre transports construction material in his barges but he earns extra francs trafficking in diamonds, which he hides in the boat’s rudder. Pierre engages a new first mate, Michel, who gets wise to the diamond smuggling. The film was shot in 1920, but only shown once in its 80 minute entirety at a private screening in 1924.