The team searches for the person who shot Horatio while he was standing on an airport tarmac. Several suspects quickly emerge, and one of them is a member of the team. The investigation propels the team to track down and recover cases of fused-alloy bullets capable of piercing armored vehicles that are already flooding the streets of Miami.

The death of a psychiatrist's daughter has unfortunate complications when Eric reveals he is one of her patients. Valera returns, and the lab gets a new trace technician, Luke Reynolds.