The NCIS team partners up with the Coast Guard Investigative Service when they have to investigate the murder of a marine on a dinner boat cruise.
Nick and Andy go missing while working under cover to infiltrate a meth pipeline; Swarek and the other officers find themselves in the middle of a rescue operation; Andy works to deal with all the change going on around her.
Joel and Charlie are forced to keep a secret after Alex's brother is admitted to Hope Zion in a critical condition.