Parent trap AU.
Maia Agreste is a girl living in America with her wealthy wine growing father Adrien Agreste, her house keeper Alya, and her pets Plagg and Tiiki. She has never known her mother because her parents divorced when she was a year old and haven't spoken to each other since then. Emma Dupain-Cheng is a girl living in France with her famous dress designer mother Marinette Dupain-Cheng, her grandparents, and their butler Nino. She has never known her father because like Maia her parents divorced when she was a year old and they haven't spoken since then either.
They meet at a summer camp and find that the two of them look identical well almost indentical. Maia is blonde while Emma is dark haired but their faces, eyes, and bodies are exactly like. As they spend time together they soon discover their twins and they decide to switch places in order to meet their parents and bring them back together.