This story revolves around two teenagers of different identities and different cultural backgrounds – Fa Hua and Lan Ge, whom because of a magic weapon "Only Pearl" were connected together to save humanity. The two teenagers have a symbiotic relationship because of the artifact, which makes the two teenagers with very different personalities need to go through a variety of tests together, with that, the relationship between the two see subtle changes, and they began to understand each other, and gradually the two became as close as siblings..