After a cataclysm rocks the world causing humans and animals to perish in large numbers, those left behind work to restore the land. The sage Mannaz is tasked with decontaminating a poisoned forest but quits before the job is fully finished and leaves his disciple Baum to look after things in his stead. When the handsome knight Pera comes in search of Mannaz and only finds Baum in the sage's home, he resolves to wait there until Mannaz returns. With this new unexpected housemate, Baum's life is about to get a lot more interesting.