Kaden Birch is learning to survive a Monster Surge. Hunting at night to raise his level, cooking during the day, tending his carnivorous frog colony, all the good things in life. But Kaden has attracted the attention of a powerful society, one who isn't interested in the life he wants or doesn't. To learn to tend his Dungeon Core, Kaden must leave what he knows behind. In a strange land without his party, Kaden struggles to forge new friendships and form new alliances. But when a power struggle with a crown prince spills over into a battle for survival, Kaden must become more than just a Beast Master. Against the might of a magical prodigy, it will take the power of a Dungeon Master.