Haru visits Canada to spend the summer holidays in the woodland house of his strict, strong-willed mother, Haruko. There, she burdens him with the responsibility of caring for his younger adoptive brother – a wild and unruly little boy named Ren, who trusts no-one and who prefers to wander in the woods with Haruko's dogs rather than associate other people. Haruko orders Haru to "civilize" Ren. As the young man…