The story starts with the birth of a prince and the series of events that follows. Fifteen eons ago, the 'Great War' was fought between the Anndas and a group of revolutionaries, in which the revolutionaries came out victorious. The Anndas were chased out of the empire and were made to live in the forest like nomads. The revolutionaries named Ragupta Moriya as their king, and thus the Great Moriyan Empire was formed. Great songs and stories were written about Ragupta Moriya and his ten war generals who fought out the evil Annda Empire. After fifteen years, a plot is made to overthrow the Moriyan Empire. And it all falls on the shoulders of Ragupta to win the battle.

After nearly 2300 eons, the life of Dr Sebastian Stein is under peril. A mysterious man in a black suit is in pursuit of capturing Dr Stein, but Sebastian is saved by his father's old friend. When Sebastian starts to learn about the death of his father, he realizes there's no other way to escape but to run for his life.

What exactly happened in Before Clearance Existence (BCE) for it to affect the life of Sebastian Stein in After Clearance Existence (ACE)?