Three years ago, she rescued him from serious injury in a cave during a heavy rain. In the dark night, I thought it was a proposal in a dream, but unexpectedly it turned out to be a real thing. Three years later, she reunited with him at a cocktail party. However, time passed and they had long forgotten each other's appearance. When the emotions buried deep in the heart are awakened, and when the fragments of memory are pieced together, what will be the fate of the two of them?