Helen has found herself kidnapped by Cyril Blackman's thugs, but manages to escape. However, Bernie and the gang need to find her quickly before the others get to her. They also discover that Inspector Dearlove has also become aware of their activity and starts making awkward inquiries. Deciding to travel to Holland to try and find the woman on the old photograph found in Helen's father's possessions, they have no idea that two others are already there with the same idea.