After his divorce, Lin Yu guards a convenience store with slow business when a three-year-old cute toddler, Yu Yu, suddenly comes to his door to acknowledge him as her father, unexpectedly activating the "Super Dad System". While learning to take care of his daughter, he relies on magical goods and new skills to improve his business, making the small shop gradually win the favor of customers. Facing peer competition and the landlord's harassment, he strives to find a way out, and also learns to shoulder responsibilities in their daily parent-child life. Meanwhile, Yu Yu's arrival brings up the past between him and his childhood sweetheart Qin Ya, adding warmth as well as suspense to ordinary life.