Miraculous: Tales of Ladybug & Cat Noir (2015)

S04E16 Simpleman

Adrien seeks a favor from Marinette, who finds it hard to refuse. As a result, she leaves her grandfather in charge of the four kids she was supervising to assist Adrien. Unbeknownst to her, this decision puts her grandfather in the crosshairs of Shadow Moth, making him the villain's next target.