According to the biggest dating website's research, teacher is among the top five professions most likely to cheat, and their students' parents are among the people whom they cheat with. Xiao-xiao, who has mild ADHD, is the troublemaker in her class. But she has her own trouble - her mother Wei-fang and her homeroom teacher, Paul, have started a romantic relationship as a result of discussing her ADHD conditions.
When Red’s boyfriend breaks up with her on her 30th birthday and throws himself at her new boss, she quits her job and signs up for a new Instagram account to start ranting about her shameless ex. Her life takes a dramatic turn when her posts go viral.
Dragon Brother, once a former underworld boss, now runs a cleaning company that specializes in cleaning up death scenes. Together with his disciple, Da Chuan, they enter various accident sites, witnessing the myriad facets of human life and sorting out their own life entanglements. Everything takes a different turn when Dragon Brother’s daughter suddenly returns to the hometown…
