Lin Wan, a painter who lost his memory due to an accident, has a vague memory of the past, but he has an inexplicable obsession with Van Gogh's sunflowers. Gu Chen, her childhood sweetheart, silently protects her as a "stranger" and weaves tenderness through picture albums and chance encounters to help her retrieve her memory. From a lonely shadow to a family of three, Sunflower witnesses this silent love that spans time, explaining that companionship is eternity.
