Frank and Joe Hardy become involved in an intriguing mystery which revolves around their fencing master, Ettore Russo. Proof that Russo is the rightful heir to his grandfather’s estate hinges on retrieving the guard end of a broken saber lost many years ago in California. The young investigators’ quest is complicated by a bank robbery during which some of their father’s important records are stolen. A chase ensues in the grape-growing region of California as the boys engage in a dangerous game of hide-and-seek with the bank robbery gang.

While searching for the guard end of a broken saber that will solve one mystery, the Hardy brothers become involved with a gang of bank robbers.

Mystery - The Hardy Boys @21.

ATAC BRIEFING FOR AGENTS FRANK AND JOE HARDY MISSION: Investigate possible hazing at Eagle River Academy, and find the truth behind a student's death. LOCATION: A town near Bayport. POTENTIAL VICTIMS: All new students, including Frank and Joe. SUSPECTS: Seniors. Dorm monitor Mr. Diehl. The girlfriend of the dead student. THIS MISSION REQUIRES YOUR IMMEDIATE ATTENTION. THIS MESSAGE WILL BE ERASED IN FIVE SECONDS.

Frank and Joe Hardy are in New York City to investigate the murder of a runaway teen, Evan Davis who was pushed off a subway platform.

ATAC BRIEFING FOR AGENTS FRANK AND JOE HARDY MISSION: Determine the cause of recent injuries and deaths at a camp for troubled teens. LOCATION: The wilderness surrounding Moosehead Lake in Maine. POTENTIAL VICTIMS: More boys in the program. Counselors. SUSPECTS: We have reason to suspect that the founder of the camp, Linc Saunders, is behind this.

Frank and Joe are sent to find the missing son of a UN Ambassador.