Doctor Caboche has the formula that turns the fur of his wolves into golden fleece! He raises them in a vast shed surrounded by barbed wire, but you can't really call what happens in there living: wolves are counted, registered, inventoried, shorn. A wolf is nothing but a number. This is where 730 is born. One morning, an injured swallow becomes trapped inside. 730 takes her in and cares for her. Once healed, she is set free once more and flies away through a slit. On the advice of old wolf 173, 730 sneaks a peek through the slit through the swallow has flown and discovers the outside world. According to 173, free wolves roam there... From that day on, 730 dreams of only one thing: freedom!