When the sweetest belle has green eyes, the world shall meet its untimely demise.

An ancient prophecy foretells that if the 'Sweetest Belle' has green eyes, she will bring the world to ruin. Rarity refuses to believe that her Sweetie Belle is the one the prophecy foretells. However when Sweetie Belle begins to display the signs Celestia, Luna, and Cadence warned her to look out for, Rarity has to decide if she should let her sister die to save Equestria or protect her sister from harm. And if Sweetie Belle finally finds out what they have in store for her, Rarity dreads what actions her little sister will take.