When her friend's affair with married ad exec Harrison Hill (Bruce Willis) ends in the woman's murder, investigative reporter Rowena Price (Halle Berry) vows to bring the killer to justice. Suspecting Hill of the crime, she goes undercover by posing as two highly alluring women: Katherine, a sexy temp who works within his agency, and Veronica, a seductive temptress he chats up online.

Engaging in a dangerous game of cat-and-mouse, both Rowena and Hill begin to realize things may not be what they seem. For some people will go to great lengths to protect their secrets, even if it means risking everything.