Twilight arrived back to her home with Sunset Shimmer from the portal with some concern after visiting her friend in the human world. Apparently, her human friends told her that she had mental problems and keeping herself away from everyone when she read the book called Gen Zero. Curious on what happened, Twilight took her friend to bed and invited her friends over to find out about this strange book. What neither ponies knows is the book contains a dark past history of before the first Sonic Rainboom, before the Royal Sisters, before the Tree of Harmony, and before Megan's arrival.