While visiting Twilight on Hearts and Hooves Day, Shining Armor and Cadance are surprisingly called by the Friendship map to try and settle a serious problem in Ponyville-- a problem that seems to be connected with a mysterious prowler who seems to be interfering with ponies' love lives

Spoiler: No... he is not jealous of Princess Cadance, or her marriage to Shining Armor or any of that stuff this time.

LESSON: There are some things you just can't help or change.