Voight and the team help retired Cmdr. Perry extract his nephew from a corrupt unit.
When Danny accepts a bodyguard side job for a released ex-con who took the fall for someone else, he decides to go after the real criminal.
The team links a bizarre crime scene at Arlington National Cemetery to a string of attacks on homeless veterans; Vance orders McGee, Bishop and Torres to complete hours of evidence garage cleanup for withholding information.
McGarrett and the Five-0 are captured while tracking a dangerous nemesis to the island of Lanai; Grover takes his son to Chicago, where he testifies against a dirty cop.