Fang Xiaoying, an introverted girl, has always been easily ignored since she was a child. One day, she found that she was forgotten by everyone and became a completely transparent person. In despair, she accidentally discovered that only Yu Zhiang, the school hunk who had misunderstood her before, could see her. The two reached a contract, and Yu Zhiang helped Fang Xiaoying to find herself again. The two developed feelings for each other in the "two-way protection", and Fang Xiaoying gradually regained her confidence. However, one day, Yu Zhiang found that he could not see Fang Xiaoying...