Liu Yingying entered the Niannianyou Entertainment City in the identity of a "contestant", intending to find the truth about her personal background, but step by step she sank deeper into a trap manipulated by capital. Amidst layers of mysterious puzzles, she and Keke, the entertainment city manager whose stance was originally opposed, moved from probing and suspicion to trust and collaboration, completing their growth and transformation in cognition and action. Facing illegal experiments and power coercion, the two did not choose silence or obedience, but instead became fulcrums for each other in the darkness, breaking through the difficult predicament.