This is a collection of short stories by Jack London. The action of the stories takes place in the bay of San Francisco, in the center of the plot is the activity of the local fish surveillance. The narration is conducted in the first person, the narrator is the owner of the reindeer sloop, chartered by a fishing company to patrol the bay in order to prevent illegal fishing methods. Another main character is Charlie Le Grant, if not involved in the events, then at least mentioned in each story.