Setsuna continues on his journey with his apprentice Alto in tow. Along the way, Setsuna nurtures Alto's relentless curiosity while showing him the love and care he was denied earlier in life. But the pair's bond is put to the test when Setsuna is attacked by a pair of beastfolk who mistake him for a slave trader... Meanwhile, Alto experiences a host of new feelings-from doubt to envy to love-toward Setsuna as their teacher-pupil relationship evolves over the course of their travels. When the two happen upon a woman while exploring a cave, they begin to consider what it means to be family...