The story is about a famous mystery thriller novelist Richard Castle. who is called in to help investigate a series of copycat murders based on his novles. Castle is soon questioned by NYPD Detective Kate Beckett, who is a very bright, sharp, and aggressive spy. Castle uses his connections to charm his way into shadowing the captivating Detective Kate Beckett. He decides to use her as a personality basis for his next book series. When the initial case is solved. Then Castle and Beckett build their new relationship and continue to investigate strange homicides in New York, combining Castle's writer intuition and Beckett's creative detective work.