When Zhao Lang met his girlfriend Su Tang's parents for the first time, his childhood sweetheart Lu Hang suddenly appeared and knelt down in public to accuse Zhao Lang of being the culprit of bullying him in high school for three years. The relationship between Zhao Lang and the Su family was instantly frozen. Faced with Su Tang's suspicion and the "evidence" presented by Lu Hang, Zhao Lang calmly retorted, claiming that he had never attended high school due to family changes. In order to prove his innocence, Zhao Lang launched an investigation with the help of his friends and found that the bullying incident alleged by Lu Hang was indeed true, but the real bully was actually Zhao Lei, a senior at Lu Hang, and Zhao Lei had died in a car accident many years ago.
