When a marine is shot, the team investigates. They start by talking to him, he tells them that he went riding and he got shot probably by a hunter. They check out his story and learn he wasn't telling the truth. They go back to see him but he left the hospital, not fully healed. They learn a relative came and helped him. They see the relative, who doesn't know much but they find a bag filled with drugs. They think the bag belongs to his son. So they try to talk to him but he disappeared. They think the boy was asked by a drug ring to deliver the drugs but he changed his mind which means his father is trying to protect him. But the gang will stop at nothing to get them, so they try to find them. When Kai's father doesn't see his doctor, Kai needs to put aside his feelings to help his father.

The wife of a naval weapons Officer disappears. The team investigates and find the man who took her, dead. She left the vicinity around the time the man was killed. They look into her background but Whistler tells them to back off. Tennant relents and with the info they have, she deduces the wife works for the CIA. They find her but her husband gets taken. Whistler wants to take her but to save her husband, they need her.

The NCIS team investigates the death of a Navy sailor and goes head-to-head with a ruthless local criminal organization. Also, Lucy looks for a new apartment.

When the mother of a young boy goes missing, the NCIS team sets out to find him and learns they aren't the only ones searching for him