Hugh “Bulldog” Drummond is on the precipice of matrimony to his beloved Phyllis -- but a bank robbery and a daring escape is going to get in their way before they reach the altar.

Captain Drummond and his girlfriend want to marry but a hidden treasure in the house in which they want to celebrate their marriage is complicating the situation involving a series of deaths and an elusive murderer.

The invention of a machine that can cause remote explosions brings the attention of Scotland Yard and Bulldog Drummond.

Drummond's wedding with Phyllis is interrupted when the inspector guarding their gifts is killed. He tries to trace the killers and uncovers the mystery of diamond counterfeiters.

Drummond manages to save a woman from jumping in front of his car but she runs away with his car. He traces her and she asks him to help her out of a dangerous situation.