Pride and the team investigate when a petty officer drops dead while arriving at the airport. Before Loretta can even perform an autopsy, however, a gunman takes her, Sebastian, and the intern Danny (from NCIS: New Orleans Season 1 Episode 16) hostage. He demands that Loretta released the body to him at once.
When Pride calls Loretta, she surreptitiously lets him know that they're in trouble. Things get out of hand after a security guard realizes that something's wrong, and the guard and Danny are both wounded. Danny, Sebastian, and Loretta are trapped in the morgue with the gunman.
After Loretta hurts her hand, Sebastian is forced to operate on Danny for her in order to prevent Danny from dying. Meanwhile, the team follows up on a lead, which leads them to a Russian doctor who was cutting drugs from dead drug mules. The doctor identifies the gunman as Marcus Martel.
Brody and LaSalle go to Martel's home, where the discover that Martel was friends with the dead petty officer. Martel's brother was a SEAL who was killed in the line of duty, and Martel had been trying in vain for ages to get the true story behind his brother's death.
Sebastian, with Loretta's guidance, opens the petty officer's body and finds not drugs, but a flash drive. Unfortunately for Martel, the information is encrypted. Patton Plame comes up with the mission report for Pride, who goes in before the FBI can mess things up. He tells Martel the true story and safely defuses the situation. Danny is taken to the hospital and stabilized.