At the campus lost and found, Uncle Hua, who possesses super-strong observational skills, relies on a sketch pencil to always accurately draw the characteristics of lost items and retrieve lost belongings. Facing the questioning from Chu Tiankuo and others and the bizarre campus history exhibition hall badge theft case, Uncle Hua, by exploring clues such as subtle residual glue, odors, and glass cracks, step by step uncovered the truth hidden behind heavy resistance. After putting on high-tech auxiliary glasses, Uncle Hua will continue to lead this group of students with distinct personalities, using his paintbrush to crack more suspenseful campus puzzles.