The Mardi Gras in New Orleans, it is Fat Tuesday and a ferry carrying several hundred US Navy Sailors and their families explodes and sinks. More than 500 people are killed. Agent Doug Carlin (Denzel Washington) of the Alcohol, Tobacco, Firearms and Explosives (ATF) is part of the investigation.He learns that the burnt body of a woman, Claire Kucheva (Paula Patton) was pulled out of the river before the time of the explosion.
He is convinced that the body of Kucheva holds the key to apprehending the person responsible for the bombing. He is soon introduced to a new program which enables them to look into the past in great detail and they use it to get the identity of the bomber. The bomber is arrested and he admits to the bombing.
Soon Agent Carlin discovers that the program can physically take a human being from the present into the past and then he get's an Idea and attempts to save the lives of the ferry victims together with the life of Claire Kucheva, if Possible.
