CPAJourney1 on "How the 18 months- to pass the exams works?"

Hi there,
As per my understanding, after passing one exam (or exams, if you passed more) you have 18 months to pass the rest.
what happen if the 18 months ends up and I failed one for example? I must re-start with the whole bunch of exams again?
I'm confused in how this works?
Someone that explains this?

THanks