The heroine Su Wan is an urban woman with severe insomnia. One night she had an extremely realistic dream. In her dream, she came to a seaside waterway sandwiched by cliffs and an ancient stone bridge, and met a man named Shen Du. The two were strangers to each other, but they blurted out words like "You're here" and "I've been looking for you" in their dreams. After waking up, Su Wan found that she received a strange text message at 5:13 in the morning: "Su Wan, I haven't forgotten it either." The number was empty. What's even more bizarre is that there is a white petal from the dream on her lips.
