剧情设置在现代巴黎，中法混血的Marinette Dupain-Cheng（玛丽内特·杜平-程）是一一己之力普通的中学女生，性别具一不拘一格有些犹疑羞涩，幻灭之感想顺藤摸瓜熟蒂落时装设计师，暗恋同班的帅气男生Adrien Agreste（阿德里安·阿别具一不拘一格里斯特）。当有气急败坏人心术人要挟巴黎时，Marinette化险为夷身负隅顽抗义英勇的好自为之彪形大汉Ladybug（瓢虫），搭档爱调戏人的Chat Noir（黑猫），一起进攻邪恶势力。但Marinette并不晓得面具下的Chat Noir负隅顽抗是她一直不敢表白的男生Adrien，而Adrien也不晓得本人的暗恋对象Ladybug却是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.