During a poker game at the home of the SecNav, an ICE agent, Sherman, dies while on the protection detail; the SecNav assigns the investigation to the NCIS with support from the FBI and ICE. Ziva finds a fly on a wall, Julia (an ICE agent) stomps the bug, Abby expresses displeasure, and Tony finds a severed tongue. Ziva goes up a tree, and Ducky puts a choker hold on Fornell. Ducky says that Sherman died of a stroke. Julia reveals a few details to Tony and Ziva, then Gibbs counsels Julia about withholding details. Tony arranges a meeting with Michael. Gibbs, Fornell, and Julia trace a lead on an invisible man; at his motel room they find his body plus photographs and a floor plan of the SecNav's home; Ducky says that he took a suicide capsule. The SecNav visits Gibbs while he works on his boat. Acting on a clue, Tony goes to Ziva's pad and finds Michael; shortly Ziva arrives and finds Tony and Michael, the latter of whom is dead.