On the eve of the graduation performance, Zhao Muyun went to the Mogao Caves and discovered that the very mural that had triggered their time-slip had vanished. In the past, Chen Xi had been critically injured while trying to protect both the mural and Shen Huan. Using her last bit of strength, she urged Shen Huan to complete the painting. The moment the final stroke was placed in the past, the lost mural miraculously reappeared in the modern cave.