No introductions necessary.

American Psycho - Patrick Bateman is a high-powered Wall Street executive - rich, handsome and highly intelligent. In many ways he's just like everyone else enjoying the excesses of America in the 80s. But unlike his colleagues, Patrick prefers murders and executions to mergers and acquisitions!
American Psycho 2 - Patrick Bateman is dead, but his evil legacy continues in the body of Rachel Newman, the only victim who managed to escape Bateman's grasp. However, she did not remain unscathed from the encounter, instead, Rachel has developed an obsession with serial killers.