On the first day Tong Yan moves into her rented apartment, she catches someone picking the lock on the door opposite hers and kindly calls the police, only to discover that the person is her neighbor, Mu Zhanli. Mu Zhanli is a young man with several jobs, working as a food delivery rider and a designated driver, but he is actually a rich second-generation heir. He is also a former undercover narcotics officer suffering from PTSD. Haunted by trauma after returning from undercover work, he has long been determined to die. That is, until Tong Yan, an optimistic and resilient woman with a physical disability, moves in. She is always asking him for help, whether it's moving furniture, changing light bulbs, or rescuing a cat. He finds her noisy and annoying, but ever since this meddlesome young woman appeared, he no longer wants to die.