Police Sergeant Dum, a veteran cop struggling to keep up with the changing society and technology, is on his last day before retirement. 

When a distraught mother discovers her injured son beside the murdered body of his girlfriend, the police are quick to dismiss the case as murder or suicide. Only Sergeant Dum remains unconvinced by the evidence, and stands up against his superior to seek the truth. An outcast on the squad, he gets help from a wheelchair-bound computer hacker.