In all the years Luna spent imprisoned, the sun and moon still rose in Celestia's wake. How was such a feat ever performed or even possible?

In the last of Luna's efforts to find the answers,she agrees to a wicked wager, one she intents to win at any and all cost. Celestia cares for her sister truly... so much so, that there are just some secrets even she won't confess to without proper "incentive."