There is a large virtual space called "Deep Forest," where many people travel as avatars. Origa is a schoolgirl who has become a DF explorer in an effort to discover the reason behind her mother's death. Luckily, she has a famous hacker on her side as a guide, a monkey avatar called Jr. Deep Forest is indeed a dangerous place, contested by the company she believes is responsible for that death, hackers and other shady parties: Origa will have to follow a difficult path for uncovering the truth.