A destroyer of the US Navy encounters an unexpected storm in the Atlantic Ocean off the coast of Virginia; two sailors on the weather deck find and recover the body of the ship's medical officer; Gibbs and company meet the vessel in Norfolk and start to investigate; Ducky comments on a wound and a bruise, possibly resulting from a jab by a hypodermic needle. McGee's father, a full admiral, temporarily aboard the ship, raises objections, creates friction, hassles Tim, and spreads discontent. The Duck finds a part of a broken needle in the body; Tony identifies a suspect, whom he and McGee interview aboard the ship. Burley, an agent afloat working with the team, learns about the removal of a tablet computer; Tony and McGee find the tablet, and McGee obtains data from it, thereby learning the name of the last visitor to the sick bay before the doctor died. The gang identify the killer and bust him. McGee walks and talks with his father.