John Harland is a former boxer turned reverend posted to the town of Kangaroo. He falls in love with Muriel, an orphaned heiress, and discovers that her guardian Martin Giles is embezzling her inheritance. Harland earns the ire of parishioners by teaching young boys to box, and Giles manipulates local opinion to have the bishop remove him. Harland rescues a gentleman from a mugging in Sydney who suggests that he go to Kalmaroo where a criminal gang has driven the church out of the area. Harland preaches, and unexpectedly sees Muriel in the congregation; her property is near Kalmaroo. But her overseer is Red Jack Braggan who leads the gang which violently breaks up Harland's mission - much to the distress of Muriel who regards Harland as too timid - and is in cahoots with Giles. Harland goes to work as a station hand at a property neighbouring Muriel's. Giles arranges for Red Jack to kidnap Muriel so that he might marry the girl and thus prevent her giving evidence against him. Harland rescues Muriel: they leap from the stage coach as it thunders across Hampden Bridge into the Kangaroo River.