During a night training jump a Marine dies when his main chute fails to open, and he fails to pull his reserve chute. Kate, formerly of the Secret Service, joins the NCIS gang; they investigate, and they soon find evidence of sabotage of the defective chute. The investigators run into a wall of silence. The victim was on painkillers for a recent injury, so his reaction time was slow, but that made no difference anyway. To get help with a legal matter, Gibbs calls in Lt. Bud Roberts from the headquarters of the JAG Corps of the US Navy. The gang identify not only the murderer and his method but also a drug connection. Gibbs and Tony take a ride, and Tony unintentionally makes a jump.