John Stepton, owner of a once prosperous mine, finds himself on the verge of bankruptcy and is on the point of selling out to Graham, a chap who is picking up all the mines in the district. Edgar Collins, a young mining engineer, whom Stepton has engaged to trace a lost lode of the mine, tells him that he thinks he has discovered the lode which leads under Gloria mountain. This spoils the sale. Tom Higgins has been Stepton's assistant and is in love with Stepton's daughter, Gloria, who does not favor his suit, as her heart already belongs to Collins. One of the drillers has discovered a new vein and disclosed the place to Higgins, who tells him to keep his knowledge to himself and they will buy the mine from Stepton and then work it themselves. Collins forms the plan of blasting the mountain and makes all preparations. Higgins and the driller decide to frustrate this by cutting the wires just as Collins is ready to press the button and then when he goes to investigate the wires will be put in contact and he will lose his life. One of the men who is working for Collins is assaulted by one of Higgins' men, who rolls what he thinks is the dead body down the mountain-side, but the man revives and manages to phone Gloria what has happened. She is away, but returns on her yacht and swims ashore. Higgins and his men tamper with the wires and pull the lever, causing the explosion, but Collins is not injured. The picture ends happily as the lost lode has been found.
—Moving Picture World synopsis