Invincible

Mercenary by name and by nature, Carson is a Lakota Sioux who stays to himself and never keeps women around long enough for anything emotional to develop. Working with Cash Grier on a murder investigation provides Carson with the fun of shocking Cash's sweet-but-traditional secretary, Carlie Blair, with tales of his conquests. Then Carlie lands in deep trouble. She saw something she shouldn't have. Carlie is now the key piece of evidence in a high-profile murder case. And her only protection is Carson.