Jenny is searching for Greg alone. Not far away Greg is travelling with Agnes when they come across an old woman in distress. She introduces herself as Mrs Butterworth and explains that she is being plagued by what she terms 'red indians'. Greg investigates and discovers a community of children are behind the raids on her house. They are led by a tough boy called Eagle who does not want Greg to interfere, despite the fact that many of their number are dying of a mysterious illness... (thetvdb.com)