The Fellowship of the Frog is a typical, fast-paced Edgar Wallace thriller. The plot centers around the identity of an arch-criminal who is using down and outs to do his dirty work. The Frog is a menace to Society. A criminal mastermind who has organized the tramps of Britain into an unlawful army. He murders, he robs, he blackmails... He must be stopped. But who is he? There is no shortage of suspects and no shortage of twists. Richard Gordon, a prosecutor, and Sgt. Elk, set out to unmask the head Frog and bring him to justice. But it seems that the Frog has some insiders at Scotland Yard, who help captured criminals escape and who help misdirect the forces of justice.