As the Apprentice Guardian, Leo Wilder's duty is to protect his village from the monsters that lurk in the surrounding forest. To do that, he needs magical stones that can only be found in the depths of the Endless Mines. When the stones run out, Leo will need to venture on a journey that will take him further into the forest than he's ever been. He'll encounter old foes, forest folk, and his most deadly monster yet, the Shrieking Serpent.