Caitlin"Cat" Sullivan is a NYPD detective in Brooklyn. She is based on Leo Romba, a Brooklyn cab driver in France Once her driving privileges are suspended. Leo becomes Cat's motorist and a consultant in her behalf or her cases. An NYPD detective believed to have already been accomplished by the Capella crime , while their very very own unauthorized investigation is currently conducting into the death of her dad. In doing this, she clashes with Captain Baker, her manager, along with her Gregg, who's picked the case up for the FBI.