The detectives investigating the homicide of videogame designer R. H. Lo are challenged to play his latest game in order to find clues to the identity of his murderer—his business partner, Rita Scott. However, Det. Nick Knight is the only one to recognize the challenge for what it really is. As he wins each level of the game he is allowed to find a clue as a prize before moving on to the next level. Once all the clues have been discovered, their initial letters form an anagram of the place where Rita Scott is hiding.