The story follows a rat named John who is teaching his two sons, Jim and Paul, how to hunt for food safely in the city streets of Sydney. He warns them of the dangers of dogs, traps set by humans including cages, mousetraps, and sticky traps. While out searching for food with his sons, they get chased by dogs but escape into a tunnel. Later, Jim almost falls for a mousetrap with cheese but uses a stick to trigger it instead. They realize a human is waiting outside to catch them, but finally make it home safely once the human leaves.