Working class Irishmen Lars Hanson (as Gypo Nolan) and Carl Harbord (as Francis McPhillipp) are members of an anti-establishment "Party", where politics is punctuated with gunfire. While maintaining a friendship with his comrade, Mr. Hanson is obviously interested in Mr. Harbord's fickle moll, the lovely Lya de Putti (as Katie Fox). After Harbord kills the local police chief (during a gunfight) he is driven underground; leaving Ms. de Putti free to hook up with Hanson. Then, when Harbord surfaces to visit his mother, Hanson suspects he is seeing de Putti. So, Hanson becomes "The Informer", hounded by detective Warwick Ward (as Dan Gallagher).