A once wealthy teenage boy whose family has fallen on hard times is found dead in a rowboat floating along the lake in Central Park. As Castle and Beckett try to piece together the events leading up to his death, his friends do everything in their power to thwart the investigation. As they unravel the truth from the lies, a story of betrayal and obsession emerges. Meanwhile, Castle debates whether he can leave Martha home alone while he chaperones Alexis’ class trip to Washington, DC. Martha might be an aspiring “Life Coach,” but that doesn’t mean she’s trustworthy.
Castle and Beckett investigate the murder of a nanny in her 20s who is found murdered inside a dryer in the laundry room of an updscale apartment building in Manhattan. Castle begins his research into Beckett’s personality and behavior to develop the character for his new book.
Mystery novelist Richard Castle is questioned by police after two murders bear a strong resemblance to the murders in his novels. Later, Castle finds himself helping to investigate the crime displaying a unique insight into the true motivation of the killer.