Frank and Bobbins are the only people not allowed to be part of Operation Steel Fist which is investigating a major drugs ring. They manage to change all this when they find out that Beesley has had several complaints made about her attitude towards women and is in danger of being sacked. They use this information to blackmail her into giving them all the jobs they've ever wanted – as police frogmen, undercover cops and they even get a disastrous trip out on police horses. Best of all, they get to head up Operation Steel Fist and eventually come face to face with Mr Big.