Mmm, got it, ok, not tested and not 100% if possible (can test it tomorrow) but from top of my head,
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I would show then the single story as a LIST also (where you filter from the Story you just selected and returning only 1 item).
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Add an autonumber (incremental) to each user story
when user is inside a story (being a single item list) when you click the “Back” button, it would redirect to another story screen but with a filter of the previous ID -1 (STORY ID - 1)
and if next, it would be (STORY ID + 1).
I will try and create a template tomorrow, as I also need it for my app. Hope at least gives you some ideas.