When Senior year student Claudia Wanders is found dead, her half-naked body hanging on the chalk board in room 404, everyone in that class is taken as a suspect including their faculty members. No one is innocent, each student has something to hide, pointing fingers at each other and Detective Silver finds this case getting even more interesting and complicated as he digs into the lives of all the students in room 404 trying to find the real killer but everyone just seems as guilty as the next.