20,400 yuan of class fees mysteriously vanished, and 12-year-old boy Zhao Mingyu unexpectedly becomes the number one suspect! Surveillance points to him, cash is also found searched out in his schoolbag, and all the school's parents force him to confess! Facing everyone's humiliation, sanitation worker father Zhao Guoping steps forward, vowing to return his son's innocence. However, as the investigation deepens, a torn ledger, a mysterious bank transaction record, unexpectedly drags out a shocking secret hidden behind the campus!