Tom Cutler (Samuel L. Jackson) is an ex-cop turned crime scene cleaner. When he arrives at a suburban house to clear up a gruesome murder he finds no one home. Finding a key outside the house he enters and proceeds with his horrific task. But when he returns with the key he meets the owner Ann Norcut (Eva Mendes) who has no knowledge of a murder in her house. When she reveals her husband has gone missing, Tom realises he has unknowingly covered up a murder. With the help of his ex-police partner Eddie Lorenzo (Ed Harris), Tom has to fight to identify the murderer before he finds himself implicated in the killing. And soon he realises he is involved in a scandal that could rock the police force to its foundations.