Adrien Agreste created instrumental music under the name "Chat Noir", but lost his passion for it when his mother died of cancer and was forced to move into a small apartment in the city to save money so he could start making music again. He thought his passion was gone, that is until he met the lovely neighbor next door. Marinette Dupain-Cheng designed clothing under the name "Ladybug Designs" but lost her ability when no music was helping her fuel her creativity. Suddenly she finds an album by "Chat Noir" that sparks a whole new line of designs.