Well I don't know your details of course, but I wonder if you utilize 'unknown' as part of your story at this point. So perhaps your characters, during the story writing, will help you work out the details that you yourself don't yet know.

Our characters can be rather clever in their own right after all ;)

Blaze onwards!


oh, and PS, possibly another option is to do a future exercise next (like jump ahead a day and do that one, so you won't slip past 72 hour mark) while still chewing away on the exercise that is being troublesome. Pretty sure our lovely overseers here would allow that.