Esther wants to kill her children. So Bonnie sends Elena back in time to prevent them from losing their humanity. Only after Bonnie sent Elena back in time 1000 years...Esther is killed by Damon. Damon thought that Esther had Elena captive. So he got really mad and killed her. When he found out she had been sent back in time, he turned off his emotions and went on a killing spree. The only thing Elena can do to get back is complete her quest somehow. Then she will be sent back to her present time. Meanwhile, the originals are getting flashbacks of everything Elena does. It's up to her to save them from themselves. #1 in Kolena on 5.20.18