Qi Yan, a genius from a poor family who was kicked out of his dormitory, used all his savings to buy an abandoned teaching building. Unexpectedly, Lin Xiao, the ace of the school team, took the initiative to move in with him. As this forgotten building gradually transforms into an underground temple of technology, the shadow of the school board, the hunger for truth from the campus reporter, and the silent testimony of retired workers all make this building no longer just a refuge. They used codes, machines and lies to reconstruct a real campus in a place where the sun cannot shine.
