Gu Qingcheng, a young florist, unknowingly absorbs the flower spirit of Lyu Gengyun, a thousand-year-old half-demon. Mistaking him for the Floral Immortal, she takes him as her master, while he stays by her side to uncover his past. As they grow closer through magical adventures, fate, hidden identities, and the arrival of the true Floral Immortal put their bond to the test.