The Unknown: On the lam, criminal Alonzo hides in the circus as The Armless Wonder—a performer who uses his feet to hurl knives. Alonzo keeps the arms he really has concealed to hide his identity. Meanwhile, ringmaster's daughter Nanon has a phobia of being touched by men, but is romantically pursued by not only Alonzo but the strongman Malabar. Alonzo's desperation to remain with Nanon will only end in tragedy.