Saddened by her grandfather's death, Maria goes on vacation with her friend João. After being threatened by three thieves and helped by a traveling Japanese man who opens their eyes to the mysteries of love, the pair get lost in the forest and end up at the house of a strange woman, who reveals herself to be the powerful witch Astarte. Realizing the danger they are in, Maria asks the forest beings for help, who teach her the secrets of the four magic keys: earth, air, fire, and water. With these teachings, Maria sets out for the final confrontation against Astarte.