Something Wicked This Way Comes

Klaus Mikealson has lived for centuries, never coming across anyone who really caught his eye and made his endless like seem so bleak. But all that might be about to change.
Fraternal twin sister to Elena Gilbert, Madeline Johnson has no idea about her sister or brother. She was adopted away from her family at birth, moving across the country to California.
Unbeknownst to Madeline, she also has a doppelgänger-Katherine's older sister Eleanor. But Eleanor hasn't been seen for hundreds of years, her sister or the originals don't even know she is alive.
Elena is newly changed into a vampire and Klaus is ready to leave mystic falls, but with Madeline showing up, how will things end up?