Aida has just been accepted into her dream school in the prestigious, historic country of Roma. Since she's a Visatorre-a traveller able to go backwards in time-she's been ostracized from her village since birth. Now, she's ready to put everything behind her to advance her studies as an ancient historian.

Then she meets her bombastic future self and becomes Roma's most wanted criminal.

Lorian was the spare heir meant to marry an eastern prince, but this "princess" had other plans. They changed their name, cut their hair, and left the night of the wedding to restart their life on their own terms. Donning a stolen officer uniform, Lorian enters Durante Academy to serve their country in a new way.

Then they meet their future self, even though they're not a Visatorre, and become a more valuable target.

With the two meeting in unlikely circumstances, Aida and Lorian travel through the Roman Catacombs to learn the truth about their pasts and futures.