Well, without having read the 'Green Dolphin Street Novel', it's hard to say precisely. However, it might center around a particular mystery or drama that unfolds on Green Dolphin Street. Maybe there are love stories, family feuds, or secrets that the characters are trying to hide or uncover within the context of that street.
In 'Green Street Hooligans Based on a True Story', one of the main events is the protagonist getting involved with a hooligan group. There are numerous encounters with rival groups, leading to violent skirmishes both inside and outside the stadiums. Also, there are internal power struggles within the group the protagonist joins.
I'm not entirely sure specifically about a 'Green Street 3 Never Back Down story'. It could potentially be about a group on Green Street who face challenges but never give up. Maybe it's about a sports team or a community that overcomes difficulties in their area.