两名卧底侦探欲解决神秘的凶手，他们唯一的线索是：每个受害者都是前警察，每个人身上都有一个猩红字母，在凶手用鲜血将他们的字母拼出来之前，还有多少人会死？As a string of brutal murders plague the city, two undercover detectives race to solve the mystery and unmask the killer. Their only clues: each victim is a former cop and each has a blood-red letter painted on their body. How many will have to die before the killer spells out their message in blood?