Jiang Chen, a trainee caregiver nicknamed the "Demon," has a sharp tongue, mischievous hands, and a signature crooked Dragon King grin. On his very first day at the nursing home, he nearly gets fired by the director. But an absurd system suddenly appears, forcing him to get a group of dazed elderly residents involved in all sorts of outrageous antics. He welds nitrous oxide tanks onto wheelchairs, scares old gentlemen into making meme-worthy expressions, and leaves the director relying on emergency heart medication every day. While other caregivers take seniors to sing opera and grow flowers, he lets them experience the thrill of high-speed acceleration. While others follow the rules, he specializes in unconventional physical rehabilitation. His cheeky tricks are endless, yet somehow they always produce unexpectedly good results. The cameras follow him every step of the way, keeping the entire internet laughing nonstop. No one could have imagined that this most unconventional caregiver would soon turn the nursing home into the world's craziest legendary landmark.