Tom and Greg find themselves enslaved with Kevin and loads of others in Mr Smithson's coal mine. The rest of the gang try and find them and follow Billy who is meeting his girlfriend at a motel. Billy insists that he knows nothing and leaves under the pretence of that he will ask questions about them while on his trading route. Kevin is badly hurt when there is an accident in the mine and Greg comes up with a plan to try and escape. The rest of the gang show up determined to rescue Greg and Tom.