A story about a "slow" girl who meets a sinister prince and uses her sense of smell to help him solve the case.
• Heroine: Su Manman—a "slow" beauty who speaks, moves, and reacts slowly. She has an extraordinary sense of smell and can smell subtle toxins and hidden clues. She has a gentle personality and a kind heart, and her treatment of feelings is just like her name, which sprouts slowly but is unswerving.
• Male protagonist: Xiao Yebai—the prince looks cold, aloof, and unkind, but in fact he is thoughtful, vicious, and possesses extraordinary skills. He kept a low profile because he was investigating the royal family's secret case, and his initial impatience with Su Manman's "slowness" later turned into interest and deep-seated love.
• Second female lead: Liu Ruyan—a talented and beautiful daughter of the royal family, she admires Xiao Yebai and regards Su Manman as her love rival. She is often difficult in the early stage, but in the later stage, she gradually recognizes herself and finds her own value.
• Second male lead: Qin Zimo—the enthusiastic and hearty commander of the imperial army. He is a good friend of Xiao Yebai. He appreciates Su Manman's innocence and special abilities and protects her silently. He is one of the catalysts for the relationship between the male and female protagonists.
• Story tone: sweet humor + suspense and thrills + power struggle + warm friendship
