End Game (2006)

"The assassination was only the beginning."

Secret Service agent Alex Thomas is detailed with protecting the president of the United States but, at a public appearance, everything went wrong and the president is assassinated. Wracked with guilt, he blames himself for his team's failure. Meanwhile, seasoned journalist Kate Crawford comes to believe there's a massive conspiracy afoot and convinces Alex of it. Together they unravel a treacherous web of lies as they try to unlock the truth behind the conspiracy amid the deadly threat of shadowy assassins and ex-special ops enforcers.