A strange jewel is removed from the Castle of the Two Sisters to be studied by Twilight and Starlight, only for them to lose Rainbow Dash while their backs were turned.
When Zapp mysteriously disappears after being grievously wounded while battling Mane-iac, the Power Ponies’ search for her eventually leads to a sinister plot that threatens all of Maretropolis.
After breaking the almost four season long winning the streak of a rival soccer team, Rainbow Dash’s fortunes end with it when her defeated opponents prove to be far worse than mere bad sports.
A secret Rarity and her sister tried to hide begins to fall apart, a secret that hides a past so painful it brings tears to her eyes just to think of, will she be able to tell the ponies she loves the truth?