Gu Han raises his son Gu Xingchen alone, hoping to find a warm and complete home for the child. Through a chance encounter, Gu Xingchen meets Su Nuan, a single mother who runs an express delivery station. Although busy with life, Su Nuan always maintains kindness and enthusiasm. A small heartwarming gesture makes the father and son feel long-lost warmth. As the two families gradually become familiar, Gu Han and Su Nuan understand and support each other in their daily lives, and the two children also build a deep friendship. Facing various trials in life, they join hands to resolve difficulties, and finally harvest their own happiness and warmth.