J who is born in a family of genius is eccentric and unsociable, he likes to skip classes and study weird formulas, a problematic student. He disappeared after he deliberately cuts his own face as an act of self-harming in front of his classmates. After a few months, a new transfer student, Chu Xia goes to find J under the instruction of her teacher to send him a letter. In the process, she discovers that J’s house is very mysterious. During his disappearance, China’s telecommunication companies are involved in a heated business battle.