Gibbs and his agents investigate a Marine who died when his parachute failed to open during a training exercise. Gibbs turns to Lieutenant Roberts to get the necessary search warrants to prove his theory.
An escalating gang war reaches the stands of a high school football game and several people are caught in the crossfire; an unlikely alliance forms.
The team investigates the death of a professor, who was found hanging from a tree after being tortured.
McGarrett explores the trail of a human trafficking ring while Chin joins Grover to investigate a murder at a rehabilitation centre.
Alan and Brad represent a woman who is accused of poisoning her husband, while Denise works a case in which a Jewish man is upset by the Bible readings at his workplace.