When Twilight is searching the Everfree Forest for a certain 'mystery potion', she accidentally stumbles onto Zecora's front door step. However, Zecora is not acting herself, the zebra preaching to the unicorn about an impending 'disaster' the day when the traditional Zebrian calendar ends, and that day is tomorrow. How does Twilight react to such ominous and shocking accusations regarding the future? And what does she plan to do about it?