Ethel Barrymore, William B. Davidson, Harry Northrup, Frank Currier, William Black, Cecil Owen, Frederick Truesdell, Redfield Clarke, Rudolph De Cordova, W.M. Armstrong
Miriam Monroe and John Conrad are two young scientific workers who, independently of each other, have discovered a chemical called exonite. Miriam discovered it while searching for a cure for cancer, while Conrad used it as a basis for a powerful explosive.