劇情設置在現代巴黎中法混血的Marinette Dupain-Cheng（瑪麗內特·杜平-程）是一個普通的中學女生性格有些猶疑羞澀夢想成為時裝設計師暗戀同班的帥氣男生Adrien Agreste（阿德里安·阿格里斯特）當有壞人威脅巴黎時Marinette化身正義勇敢的英雄Ladybug（瓢蟲）搭檔愛調戲人的Chat Noir（黑貓）一起打擊邪惡勢力但Marinette并不知道面具下的Chat Noir正是她一直不敢表白的男生Adrien而Adrien也不知道自己的暗戀對象Ladybug卻是Marinette　　Set in modern-day Paris, the series focuses on a teenage junior high school girl named Marinette Dupain-Cheng and her classmate and crush Adrien Agreste. When evil arises, Marinette becomes a superhero named Ladybug, while Adrien becomes Chat NoirCat Noir. Not knowing each other's true identity, the two work together to protect Paris from a villain named Hawk Moth who covets their powers.