Complete story — includes the ending
Castle and Beckett work together to solve a murder on a cruise ship, while it is moving out to sea. The cruise ship was smuggling uncut heroin, which the victim wanted to expose and tell the police. Beckett and Vikram find out that the heroin matches heroin produced by Vulcan Simmons' pipeline. Meanwhile, Castle asks Hayley to find out who Beckett is texting, and comes to the realization that she is looking for the murderers of her team from the Attorney General's office. After a failed attempt at catching someone who is part of the drug cartel, Beckett realizes that she cannot do it alone, and admits it to Castle.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, Castle season 8. HTML formatting and reference markers removed. · Content license