Ame comes home to find her little sister missing. She goes to her mayor, who takes her to the pack of wolves that on the outskirts of town. Together they are able to retrieve Ame's sister Yuki. But things don't go by the plan. The Dark pack declares war on them and gains the counsil on their side. The wolf pack Exo, who helped save Yuki, are deemed reprobates. A message is sent saying they will kill off the members one by one if they don't turn over Yuki. Ame must deal with living in a cave with no exists, a wolf pack on the hunt for her sister, and Kai, a cold wolf whose heart begins to warm up to Ame. They must train hard to win the war that is coming their way. But can they all survive? Or will they die trying?