Sebastian dies which leads to Lizzie remember all the memories she shared with him. She doesn't know how to deal with all those memories, everything seems to trigger them. She remembers the good ones, the bad ones and all those in between.
What if Sebastian did make it to the Malivore portal. When he comes back to Mystic Falls Lizzie has now moved on. Will he do things differently this time? Will Lizzie fall for him all over again?